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157604-32-5

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157604-32-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157604-32-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,6,0 and 4 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 157604-32:
(8*1)+(7*5)+(6*7)+(5*6)+(4*0)+(3*4)+(2*3)+(1*2)=135
135 % 10 = 5
So 157604-32-5 is a valid CAS Registry Number.

157604-32-5Downstream Products

157604-32-5Relevant articles and documents

Nonenzymatic kinetic resolution of secondary alcohols: Enantioselective SN2 displacement of hydroxy groups by halogens in the presence of chiral BINAP

Sekar,Nishiyama

, p. 3603 - 3604 (2001)

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Synthesis method of chiral trans-2-substituted naphthenic alcohol

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Paragraph 0035-0047; 0066-0067, (2021/09/08)

The invention relates to a synthesis method of chiral trans-2-substituted naphthenic alcohol. The invention provides a method for synthesizing chiral trans-cycloalkanol through asymmetric hydrogenation of palladium-catalyzed 2-substituted cyclic ketone. According to the method,a chiral diphosphine P-P * complex of metal palladium is taken as a catalyst, an acid additive is used in cooperation, asymmetric hydrogenation is carried out on a 2-substituted cyclic ketone compound to obtain a corresponding chiral trans-cycloalkanol compound. the enantiomeric excess of the chiral trans-cycloalkanol compound can reach 97% at most, and the trans-selectivity of the chiral trans-cycloalkanol compound is up to 20: 1. The method is simple and convenient to operate, practical, easy to implement, high in yield, high in atom economy and environment-friendly; the catalyst is commercially available; the reaction conditions are mild; and the method has a potential practical application value.

Organolithium/chiral Lewis base/BF3: A versatile combination for the enantioselective desymmetrization of meso-epoxides

Vrancken, Emmanuel,Alexakis, Alexandre,Mangeney, Pierre

, p. 1354 - 1366 (2007/10/03)

BF3 can be used in combination with organolithium/strong Lewis base complexes for the enantioselective nucleophilic ring-opening or the carbenoidic rearrangement of various meso-oxiranes with excellent yields and ee values of up to 87%. Mechanistic aspects of these reactions are considered. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.

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