Welcome to LookChem.com Sign In|Join Free

CAS

  • or
5α-Cholestane-4β,5-diol is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

20233-47-0

Post Buying Request

20233-47-0 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

20233-47-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20233-47-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,3 and 3 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20233-47:
(7*2)+(6*0)+(5*2)+(4*3)+(3*3)+(2*4)+(1*7)=60
60 % 10 = 0
So 20233-47-0 is a valid CAS Registry Number.

20233-47-0Relevant articles and documents

Studies of the synthesis of biomarkers. XI. Synthesis of 4,5-secocholestane and 4-methyl-4,5-secocholestane

Ma, Jian-Guo,Li, Tong-Shuang,Li, Yu-Lin

, p. 551 - 553 (2007/10/02)

4,5-Secocholestane (1a) and 4-methyl-4,5-secocholestane (1b) were synthesized from cholesterol (2) in five and seven steps, respectively. The key intermediate, 5-oxo-4,5-secocholestan-4-al (7) was reduced by the Clemmensen method to afford 1a. Meanwhile, 7 underwent selective Wittig reaction, Clemmensen reduction, and hydrogenation to give another target molecule, 1b. The structure of an unknown biomarker was shown to be different from the proposed la by gas Chromatographic and mass spectrometric comparison.

Steroidal N-Nitroamines. Part 3. Pyrolytic Denitroamination of N-Nitroamino-adamantane and -bornane, and of Several Steroidal N-Nitroamines

Francisco, Cosme G.,Freire, Raimundo,Hernandez, Rosendo,Melian, Daniel,Salazar, Jose A.,Suarez, Ernesto

, p. 2325 - 2328 (2007/10/02)

The thermal decomposition of several nitroamines has been investigated.The axial nitroamines 6β-nitroamino-5α-cholestan-3β-yl acetate (1) and 23R-nitroamino-(20S,22S,25S)-5β-spirostan-3β-yl acetate (8) gave exclusively nitrogen-free olefins.The trans-diaxial α-hydroxy nitroamines (2) and (3) afforded the 5α- and 4α-oxirane (6) and (7), and small amounts of the corresponding trans-diols (4) and (5).The 7β- and 7α-nitroaminocholest-5-en-3β-yl acetate (10) and (11) gave 7-oxocholesteryl acetate (14) and a mixture of the 7β- and 7α-alcohol (12) and (13) with 50 and 33percent inversion of configuration, respectively.The oxidation product adamantanone (16) was produced together with adamantan-2-ol (20) in the pyrolysis of 2-nitroaminoadamantane (19).Carbon-carbon rearrangement was observed in the case of exo-2-nitroaminobornane (22) and 20β-nitroaminopregn-5-en-3β-yl acetate (25).The nitroamine (25) yielded the 3-O-acetyl derivatives of pregna-5,20-dien-3β-ol, (29), pregna-5,17(20)(E)-dien-3β-ol, (30), 3β-hydroxypregn-5-en-20-one, (28), 17α-methyl-D-homoandrost-5-ene-3β,17aβ-diol, (31), and a mixture of pregn-5-ene-3β,20-diols (26) and (27).Camphene (23) and tricyclene (24) was obtained from exo-2-nitroaminobornane (22).Mechanisms for the formation of these products are discussed.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 20233-47-0