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151920-48-8

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151920-48-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 151920-48-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,1,9,2 and 0 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 151920-48:
(8*1)+(7*5)+(6*1)+(5*9)+(4*2)+(3*0)+(2*4)+(1*8)=118
118 % 10 = 8
So 151920-48-8 is a valid CAS Registry Number.

151920-48-8Relevant articles and documents

Enantioselective synthesis of 2,4,5-trisubstituted tetrahydropyrans via peptide-catalyzed michael addition followed by Kishi's reductive cyclization

Ueda, Atsushi,Higuchi, Mei,Umeno, Tomohiro,Tanaka, Masakazu

, p. 989 - 1002 (2019/08/01)

An enantioselective synthesis of 2,4,5-trisubstituted tetrahydropyrans has been achieved in four steps from α,β-unsaturated ketones and dimethyl malonate by peptide-catalyzed asymmetric Michael addition and diastereoselective construction of tetrahydropyr

Enantioselective Michael Addition of Malonates to Chalcone Derivatives Catalyzed by Dipeptide-derived Multifunctional Phosphonium Salts

Cao, Dongdong,Fang, Guosheng,Zhang, Jiaxing,Wang, Hongyu,Zheng, Changwu,Zhao, Gang

, p. 9973 - 9982 (2016/11/02)

Highly enantioselective Michael addition of malonates to enones catalyzed by dipeptide-derived multifunctional phosphonium salts has been developed. The newly established catalytic system was characterized with its wide substrate scope featured with aliphatic aldehyde-derived enones and substituted malonates. The gram scale-up synthesis of adducts can also be successfully achieved under optimal conditions with both excellent yield and enantioselectivity.

A kind of T-leucine derivative of the chiral amine compound and its preparation method and application

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Paragraph 0086; 0087; 0094; 0095, (2017/01/26)

The invention discloses a tertiary leucine derived chiral amine compound as well as a preparation method and application thereof. The chiral amine compound contains a tert-butyl group, a primary amine, a secondary amine or a tertiary amine functional group and has the structural formula as shown in the specification; and chiral amine and salts thereof are prepared through simple preparation steps by taking common tert-leucine as the raw material to form the chiral amine compound. The chiral amine and the salts thereof can be used for the asymmetrical Michael additive reaction between alpha, beta-unsaturated ketone and a nucleophilic reagent such as nitrocarbol, malonic ester, substituted oxazolone and the like and the asymmetrical cascade reaction between the alpha, beta-unsaturated ketone and fifth-position unsaturated rhodanine, between fifth-position unsaturated hydantoin and the alpha, beta-unsaturated ketone; and the tertiary leucine derived chiral amine compound has very high catalytic activity and stereoselectivity as well as the highest diastereoselectivity of 30/1 and the highest enantioselectivity of 99%, and is wide in oligomer range.

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