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18385-81-4

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18385-81-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18385-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,3,8 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18385-81:
(7*1)+(6*8)+(5*3)+(4*8)+(3*5)+(2*8)+(1*1)=134
134 % 10 = 4
So 18385-81-4 is a valid CAS Registry Number.

18385-81-4Upstream product

18385-81-4Relevant articles and documents

Kinetic Resolution of Cyclic Secondary Azides, Using an Enantioselective Copper-Catalyzed Azide-Alkyne Cycloaddition

Alexander, Juliana R.,Ott, Amy A.,Liu, En-Chih,Topczewski, Joseph J.

, p. 4355 - 4358 (2019)

An enantioselective copper-catalyzed azide-alkyne cycloaddition (E-CuAAC) is reported by kinetic resolution. Chiral triazoles were isolated in high yield with limiting alkyne (up to 97:3 enantiomeric ratio (er)). A range of substrates were tolerated (>30 examples), and the reaction was scaled to >1 g. The er of a triazole product could be enhanced by recrystallization and the recovered scalemic azide could be racemized and recycled. Recycling the azide allows efficient use of the undesired azide enantiomer.

Baker's yeast catalysed enantioselective reduction of chroman-4-ones

Ramadas,David Krupadanam

, p. 1119 - 1122 (2007/10/03)

Substituted chroman-4-ones 1a-10a on catalytic reduction with Baker's Yeast give (S)-chroman-4-ols 1c-11c with high enantioselectivity. The absolute configuration has been determined by specific rotation and CD spectra.

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