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21691-50-9

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21691-50-9 Usage

General Description

Tert-butyl L-alaninate, also known as tert-butyl Alanine or L-Alanine tert-butyl ester hydrochloride, is a chemical compound used primarily in the field of organic synthesis. Created through esterification of L-Alanine with tert-butanol, it has the molecular formula of C9H19NO2. This chemical compound is an important reagent in chemistry that is also an intermediate for preparing biologically active molecules such as proteins and pharmaceuticals. It is also an ideal building block in peptide synthesis, specifically in organic chemistry for the creation of alanine residues.

Check Digit Verification of cas no

The CAS Registry Mumber 21691-50-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,9 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21691-50:
(7*2)+(6*1)+(5*6)+(4*9)+(3*1)+(2*5)+(1*0)=99
99 % 10 = 9
So 21691-50-9 is a valid CAS Registry Number.
InChI:InChI=1/C7H15NO2/c1-5(8)6(9)10-7(2,3)4/h5H,8H2,1-4H3/t5-/m0/s1

21691-50-9SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name L-alanine tert-butyl ester

1.2 Other means of identification

Product number -
Other names Tert-Butyl L-Alaninate

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:21691-50-9 SDS

21691-50-9Relevant articles and documents

Efficient and Divergent Total Synthesis of (-)-Epicoccin G and (-)-Rostratin A Enabled by Double C(sp3)-H Activation

Thesmar, Pierre,Baudoin, Olivier

, p. 15779 - 15783 (2019)

Dithiodiketopiperazines are complex polycyclic natural products possessing a variety of interesting biological activities. Despite their interest, relatively few total syntheses have been completed. We herein report the enantioselective, scalable, and divergent total synthesis of two symmetrical pentacyclic dithiodiketopiperazines, (-)-epicoccin G and (-)-rostratin A. A common intermediate was synthesized on a multigram scale from inexpensive, commercially available starting materials using an enantioselective organocatalytic epoxidation and a double C(sp3)-H activation as key steps, with the latter allowing the efficient simultaneous construction of the two five-membered rings. In addition to the cis,cis-fused target (-)-epiccocin G, the more challenging (-)-rostratin A, possessing two trans ring junctions, was obtained for the first time on a 500 mg scale through the optimization of each step and validation on multigram quantities. Both natural products were synthesized with high overall yields (13-20%). This study should facilitate access to this fascinating and yet understudied family of biologically active natural products.

Overcoming the Deallylation Problem: Palladium(II)-Catalyzed Chemo-, Regio-, and Stereoselective Allylic Oxidation of Aryl Allyl Ether, Amine, and Amino Acids

Begam, Hasina Mamataj,Jana, Ranjan,Manna, Kartic,Samanta, Krishanu

supporting information, p. 7443 - 7449 (2020/10/09)

We report herein a Pd(II)/bis-sulfoxide-catalyzed intramolecular allylic C-H acetoxylation of aryl allyl ether, amine, and amino acids with the retention of a labile allyl moiety. Mechanistically, the reaction proceeds through a distinct double-bond isomerization from the allylic to the vinylic position followed by intramolecular carboxypalladation and the β-hydride elimination pathway. For the first time, C-H oxidation of N-allyl-protected amino acids to furnish five-membered heterocycles through 1,3-syn-addition is established with excellent diastereoselectivity.

Challenges in the Development of a Thiol-Based Broad-Spectrum Inhibitor for Metallo-β-Lactamases

Büttner, Dominik,Kramer, Jan S.,Klingler, Franca-M.,Wittmann, Sandra K.,Hartmann, Markus R.,Kurz, Christian G.,Kohnh?user, Daniel,Weizel, Lilia,Brüggerhoff, Astrid,Frank, Denia,Steinhilber, Dieter,Wichelhaus, Thomas A.,Pogoryelov, Denys,Proschak, Ewgenij

, p. 360 - 372 (2017/12/18)

Pathogens, expressing metallo-β-lactamases (MBLs), become resistant against most β-lactam antibiotics. Besides the dragging search for new antibiotics, development of MBL inhibitors would be an alternative weapon against resistant bacterial pathogens. Inhibition of resistance enzymes could restore the antibacterial activity of β-lactams. Various approaches to MBL inhibitors are described; among others, the promising motif of a zinc coordinating thiol moiety is very popular. Nevertheless, since the first report of a thiol-based MBL inhibitor (thiomandelic acid) in 2001, no steps in development of thiol based MBL inhibitors were reported that go beyond clinical isolate testing. In this study, we report on the synthesis and biochemical characterization of thiol-based MBL inhibitors and highlight the challenges behind the development of thiol-based compounds, which exhibit good in vitro activity toward a broad spectrum of MBLs, selectivity against human off-targets, and reasonable activity against clinical isolates.

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