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N,O-Bis(trimethylsilyl)acetamide, also known as BSA, is a powerful silylating agent that is used to block and protect hydroxyl groups in natural products and organic intermediates. It is a clear to yellowish liquid that is soluble in many nonpolar and polar aprotic solvents. BSA is particularly useful for substrates that are acidor base-sensitive due to the neutral acetamide that is eliminated during the silylation process. It is commonly used in the pharmaceutical and chemical industries.

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  • 10416-59-8 Structure
  • Basic information

    1. Product Name: N,O-Bis(trimethylsilyl)acetamide
    2. Synonyms: dynasylan bsa;BIS(TRIMETHYLSILYL)ACETAMIDE;N,O-BIS(TRIMETHYLSILYL)ACETAMIDE;Acetimidic acid, N-(trimethylsilyl)-, trimethylsilyl ester;bis(trimethylsllyl)acetamide;CB2500;Ethanimidicacid,N-(trimethylsilyl)-,trimethylsilylester;N-(Trimethylsilyl)acetimidic acid, trimethylsilyl ester
    3. CAS NO:10416-59-8
    4. Molecular Formula: C8H21NOSi2
    5. Molecular Weight: 203.43
    6. EINECS: 233-892-7
    7. Product Categories: API intermediates;Si-N Compounds;Trimethylsilylation (GC Derivatizing Reagents);Analytical Chemistry;GC Derivatizing Reagents;Si (Classes of Silicon Compounds);Silylacetamides;Silylation (GC Derivatizing Reagents);Biochemistry;Nucleosides, Nucleotides & Related Reagents;Protecting Agents for Hydroxyl and Amino Groups;Protecting Agents, Phosphorylating Agents & Condensing Agents;Silicon Compounds (for Synthesis);Synthetic Organic Chemistry;Blocking Agents;Protective Agents;Silazanes;Silylating Agents;Special Silanes;Silylation Reagents;Isoquinolines ,Quinolines ,Quinaldines
    8. Mol File: 10416-59-8.mol
  • Chemical Properties

    1. Melting Point: 24 °C
    2. Boiling Point: 71-73 °C35 mm Hg(lit.)
    3. Flash Point: 53 °F
    4. Appearance: Light yellow or beige to brown/Crystalline Powder, Crystals and/or Chunks
    5. Density: 0.832 g/mL at 20 °C(lit.)
    6. Vapor Pressure: 10 hPa (50 °C)
    7. Refractive Index: n20/D 1.417(lit.)
    8. Storage Temp.: 0-6°C
    9. Solubility: Miscible with many nonpolar and polar aprotic solvents.
    10. PKA: 5.82±0.50(Predicted)
    11. Sensitive: Moisture Sensitive
    12. BRN: 1306669
    13. CAS DataBase Reference: N,O-Bis(trimethylsilyl)acetamide(CAS DataBase Reference)
    14. NIST Chemistry Reference: N,O-Bis(trimethylsilyl)acetamide(10416-59-8)
    15. EPA Substance Registry System: N,O-Bis(trimethylsilyl)acetamide(10416-59-8)
  • Safety Data

    1. Hazard Codes: C,Xn,F
    2. Statements: 10-14-22-34-40-20/21/22-11
    3. Safety Statements: 26-36/37/39-45-7/8-43A-36-30-23-16-7/9
    4. RIDADR: UN 2920 8/PG 2
    5. WGK Germany: 3
    6. RTECS: AK3000000
    7. F: 10-21
    8. TSCA: Yes
    9. HazardClass: 8
    10. PackingGroup: II
    11. Hazardous Substances Data: 10416-59-8(Hazardous Substances Data)

10416-59-8 Usage

Uses

1. Used in Natural Products Industry:
N,O-Bis(trimethylsilyl)acetamide is used as a silylating agent for blocking and protection of hydroxyl groups in natural products such as amino acids and carbohydrates.
2. Used in Organic Synthesis:
N,O-Bis(trimethylsilyl)acetamide is used as a silylating agent for blocking and protection of functional groups in organic intermediates.
3. Used in Analytical Chemistry:
N,O-Bis(trimethylsilyl)acetamide is used for the formation of derivatives of H-acid compounds for analysis. The silylated derivatives are volatile and can be determined by gas chromatography.
4. Used in Pharmaceutical Industry:
N,O-Bis(trimethylsilyl)acetamide is used as a powerful silylation reagent for a wide range of functional groups under mild conditions. It is frequently used with TMCS as a catalyst to modify various functional groups, including carboxyl groups. In one novel application, BSA was used to measure carboxypeptidase activity by forming derivatives that could be determined by gas chromatography.
5. Used in Chemical Industry:
N,O-Bis(trimethylsilyl)acetamide has been used to prepare derivatives of steroids and glucocorticoids. It is also used to trimethylsilylate the hydroxyl group of compounds selectively, yielding almost quantitative results.
6. Used in Research and Development:
N,O-Bis(trimethylsilyl)acetamide is used in the development of novel drug delivery systems to enhance the applications and efficacy of various compounds against cancer cells. It has been employed in the synthesis of organic and metallic nanoparticles as carriers for drug delivery.
Physical Properties:
N,O-Bis(trimethylsilyl)acetamide has a boiling point of 71-73°C at 35 mmHg.

Preparation

made by the reaction of acetamide with a large excess of chlorotrimethylsilane in the presence of triethylamine.

Purification Methods

Fractionate it through a spinning band column and collect liquid b 71-73o/35mm, and not higher because the main impurity MeCONHSiMe3 distils at b 105-107o/35mm. It is used for derivatising alcohols and sugars [Klebe et al. J Am Chem Soc 88 3390 1966, see Matsuo et al. Carbohydr Res 241 209 1993, Johnson Carbohydr Res 237 313 1992]. Itis FLAMMABLE and TOXIC.

Check Digit Verification of cas no

The CAS Registry Mumber 10416-59-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,4,1 and 6 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 10416-59:
(7*1)+(6*0)+(5*4)+(4*1)+(3*6)+(2*5)+(1*9)=68
68 % 10 = 8
So 10416-59-8 is a valid CAS Registry Number.
InChI:InChI:1S/C8H21NOSi2/c1-8(9-11(2,3)4)10-12(5,6)7/h1-7H3/b9-8+

10416-59-8 Well-known Company Product Price

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  • TCI America

  • (B0511)  N,O-Bis(trimethylsilyl)acetamide  >80.0%(GC)

  • 10416-59-8

  • 10mL

  • 150.00CNY

  • Detail
  • TCI America

  • (B0511)  N,O-Bis(trimethylsilyl)acetamide  >80.0%(GC)

  • 10416-59-8

  • 100mL

  • 650.00CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 5g

  • 141.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 25g

  • 280.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 100g

  • 817.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 5g

  • 141.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 25g

  • 280.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 100g

  • 817.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 5g

  • 141.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 25g

  • 280.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 100g

  • 817.0CNY

  • Detail
  • Alfa Aesar

  • (L00183)  N,O-Bis(trimethylsilyl)acetamide, 95%   

  • 10416-59-8

  • 5g

  • 141.0CNY

  • Detail

10416-59-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017

1.Identification

1.1 GHS Product identifier

Product name N,O-Bis(trimethylsilyl)acetamide

1.2 Other means of identification

Product number -
Other names tms-ba kit

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:10416-59-8 SDS

10416-59-8Synthetic route

1-(Trimethylsilyl)imidazole
18156-74-6

1-(Trimethylsilyl)imidazole

N-Trimethylsilylacetamide
13435-12-6

N-Trimethylsilylacetamide

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

Conditions
ConditionsYield
at 175℃; under 75.0075 - 146.265 Torr; 30-theoretical-plates distillation column of Old-ershaw type;79.3%
at 150 - 180℃; under 78.7579 - 150.015 Torr; 20-theoretical-plates distillation column of Old-ershaw type;198.6 g
at 100 - 121℃; under 11.2511 Torr; 30-theoretical-plates distillation column of Old-ershaw type;118.9 g
at 130 - 162℃; under 75.0075 Torr; 20-theoretical-plates distillation column of Old-ershaw type;154.2 g
at 175℃; under 71.2571 - 150.015 Torr; 20-theoretical-plates distillation column of Old-ershaw type;
acetamide
60-35-5

acetamide

chloro-trimethyl-silane
75-77-4

chloro-trimethyl-silane

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

O,O-diethyl S-(trimethylsilyl) phosphorodithioate
18306-95-1

O,O-diethyl S-(trimethylsilyl) phosphorodithioate

N-sulphinylacetamide
16767-75-2

N-sulphinylacetamide

A

bis(diethoxyphosphoryl)disulphide
2901-90-8

bis(diethoxyphosphoryl)disulphide

B

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

C

bis(diethoxyphosphinothioyl)trisulfide
6926-73-4

bis(diethoxyphosphinothioyl)trisulfide

D

Hexamethyldisiloxane
107-46-0

Hexamethyldisiloxane

Conditions
ConditionsYield
for 24h; Ambient temperature; sealed tube;A 2.3 g
B 1.1 g
C 2.1 g
D 1.4 g
O,O-diethyl S-(trimethylsilyl) phosphorodithioate
18306-95-1

O,O-diethyl S-(trimethylsilyl) phosphorodithioate

N-sulphinylacetamide
16767-75-2

N-sulphinylacetamide

A

bis(diethoxyphosphoryl)disulphide
2901-90-8

bis(diethoxyphosphoryl)disulphide

B

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

C

Hexamethyldisiloxane
107-46-0

Hexamethyldisiloxane

D

1,1,1-trimethyl-N-phenyl-N-(trimethylsilyl)-silanamine
4147-89-1

1,1,1-trimethyl-N-phenyl-N-(trimethylsilyl)-silanamine

Conditions
ConditionsYield
for 24h; Ambient temperature; sealed tube;A 2.3 g
B 1.1 g
C 1.4 g
D 2.1 g
N-sulphinylacetamide
16767-75-2

N-sulphinylacetamide

phenylthiotrimethylsilane
4551-15-9

phenylthiotrimethylsilane

A

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

B

Hexamethyldisiloxane
107-46-0

Hexamethyldisiloxane

C

diphenyldisulfane
882-33-7

diphenyldisulfane

Conditions
ConditionsYield
for 24h; Ambient temperature;A 1.6 g
B 1.3 g
C 1.7 g
acetamide
60-35-5

acetamide

1-(Trimethylsilyl)imidazole
18156-74-6

1-(Trimethylsilyl)imidazole

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

Conditions
ConditionsYield
at 165℃; under 112.511 - 150.015 Torr; 20-theoretical-plates distillation column of Old-ershaw type;155.7 g
at 140 - 166℃; under 75.0075 Torr; 20-theoretical-plates distillation column of Old-ershaw type;
at 163 - 180℃; under 75.0075 - 150.015 Torr; 20-theoretical-plates distillation column of Old-ershaw type;167.6 g
at 175℃; under 78.7579 - 150.015 Torr; 20-theoretical-plates distillation column of Old-ershaw type;199.5 g
N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

(3R,4R)-2-Amino-4-(5-benzyloxy-pyridin-2-yl)-4-hydroxy-3-methyl-butyric acid

(3R,4R)-2-Amino-4-(5-benzyloxy-pyridin-2-yl)-4-hydroxy-3-methyl-butyric acid

(3R,4R)-2-Amino-4-(5-benzyloxy-pyridin-2-yl)-3-methyl-4-trimethylsilanyloxy-butyric acid

(3R,4R)-2-Amino-4-(5-benzyloxy-pyridin-2-yl)-3-methyl-4-trimethylsilanyloxy-butyric acid

Conditions
ConditionsYield
In methanol for 18h; Ambient temperature;100%
N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

N4-Boc-cytosine
172405-14-0

N4-Boc-cytosine

2-(trimethylsilyl)-N4-Boc-cytosine
528584-48-7

2-(trimethylsilyl)-N4-Boc-cytosine

Conditions
ConditionsYield
In acetonitrile at 20℃; for 2h;100%
3-cinnamyloxy-3-(3,4-methylenedioxyphenyl)-2-nitro-1-propanol
1017684-56-8

3-cinnamyloxy-3-(3,4-methylenedioxyphenyl)-2-nitro-1-propanol

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

(1R*,4S*,5R*,8R*)-8-(3,4-methylenedioxyphenyl)-4-phenyl-2-(trimethylsilyloxy)-1-(trimethylsilyloxy)methyl-2-aza-3,7-dioxabicyclo[3.3.0]octane

(1R*,4S*,5R*,8R*)-8-(3,4-methylenedioxyphenyl)-4-phenyl-2-(trimethylsilyloxy)-1-(trimethylsilyloxy)methyl-2-aza-3,7-dioxabicyclo[3.3.0]octane

Conditions
ConditionsYield
With triethylamine In toluene; acetonitrile at 85℃; for 24h;100%
N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

triethylammonium α-L-2',3'-dideoxy-3'-thiacytadin-5'-yl phosphonate

triethylammonium α-L-2',3'-dideoxy-3'-thiacytadin-5'-yl phosphonate

C14H28N3O5PSSi2

C14H28N3O5PSSi2

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 20℃; for 0.166667h;100%
N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

1-cyclohexyl-1-hydroxy-1-phenylpropan-2-one
28192-98-5

1-cyclohexyl-1-hydroxy-1-phenylpropan-2-one

1-cyclohexyl-1-phenyl-1-(trimethylsiloxy)propan-2-one
119497-46-0

1-cyclohexyl-1-phenyl-1-(trimethylsiloxy)propan-2-one

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 130℃; for 12h;98.1%
N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

friedelin
559-74-0

friedelin

3-trimethylsiloxyfriedel-2-ene
161739-59-9

3-trimethylsiloxyfriedel-2-ene

Conditions
ConditionsYield
With N,N,N,N,N,N-hexamethylphosphoric triamide; sodium at 20℃; for 1h;98.1%
TREHALOSE
99-20-7

TREHALOSE

N,O-bis-(trimethylsilyl)-acetamide
10416-59-8

N,O-bis-(trimethylsilyl)-acetamide

2,3,4,6,2',3',4',6'-octa-O-trimethylsilyl-α,α-D-trehalose
42390-78-3

2,3,4,6,2',3',4',6'-octa-O-trimethylsilyl-α,α-D-trehalose

Conditions
ConditionsYield
With tetrabutyl ammonium fluoride In tetrahydrofuran Ambient temperature;98%
With tetrabutyl ammonium fluoride In N,N-dimethyl-formamide at 15 - 20℃; for 0.75h;
With tetrabutyl ammonium fluoride In N,N-dimethyl-formamide at 0℃; for 2h; Inert atmosphere;

10416-59-8Relevant articles and documents

A at the same time improve the N, O — double (three a silicon-based) acetamide purity and yield of production method

-

Paragraph 0046-0057; 0073-0085; 0099-0111; 0125-0137, (2018/05/24)

The invention provides a production method for improving the purity and yield of N,O-bis(trimethyl silyl) acetamide simultaneously. The production method comprises the steps of trimethylchlorosilane preparation, charging, synthetic reaction and distillation. In the step of distillation, front cut fraction is obtained through distillation, and a finished product is obtained through distillation; in the step of trimethylchlorosilane preparation, according to the mole ratio of the trimethylchlorosilane to acetamide being 2.11-2.22:1, the trimethylchlorosilane is sucked into a trimethylchlorosilane overhead tank, and the vacuum degree of the trimethylchlorosilane overhead tank is kept 0.001-0.005 MPa before charging. According to the prepared product BSA, the product purity reaches 99.58-99.66%, the impurity number and content are reduced, and the amine content is 0.20-0.25%; the BSA once through yield reaches 93.42-93.7%, and the raw material conversion rate is high and is improved by more than 3% compared with the prior art.

Semi-continuous process for preparing bis-silyl carboxamides

-

Example 6, (2008/06/13)

For preparing bis-silyl carboxamides in a semi-continuous, reacting an amide or the N-trimethylsilyl derivative thereof with a silylating agent and, at the same time, extracting the bis-silyl carboxamide formed by distillation under reduced pressure.

Carbacephalosporin compound, their preparation and use

-

, (2008/06/13)

Carbacephalosporin compounds of formula (I), STR1 salts thereof, processes for their synthesis and uses thereof, wherein: R1 is hydrogen, methoxy or formamido; R2 is an acyl group; CO2 R3 is a carboxy group or a carboxylate anion, or R3 is a carboxy protecting group or a pharmaceutically acceptable salt-forming group or in vivo hydrolysable ester group; R4, R5, R6 and R7 represent hydrogen or a substituent; R4 and R7 may be replaced by a chemical bond between the two carbon atoms shown; R5 and R6 may be linked together into a cyclic system. The compounds (I) have antibacterial properties.

BIS (TRIMETHYLSILYL) AMIDE AS NITRILE PRECURSOR

Rigo, Benoit,Lespagnol, Charles,Pauly, Marc

, p. 347 - 348 (2007/10/02)

Bis (trimethylsilyl) amides are converted into nitriles with high yields when they are treated with a catalyst (tetrabutylammonium fluoride, Lewis acids or iron phthalocyanine).

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