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143746-13-8

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143746-13-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143746-13-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,7,4 and 6 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 143746-13:
(8*1)+(7*4)+(6*3)+(5*7)+(4*4)+(3*6)+(2*1)+(1*3)=128
128 % 10 = 8
So 143746-13-8 is a valid CAS Registry Number.

143746-13-8Relevant articles and documents

Stereoselective deprotonation of chiral and achiral 2-aminoalkyl carbamates: Synthesis of optically active β-amino alcohols via 1-oxy- substituted alkyllithium intermediates

Schwerdtfeger, J?rg,Kolczewski, Sabine,Weber, Berthold,Fr?hlich, Roland,Hoppe, Dieter

, p. 1573 - 1592 (2007/10/03)

A facile protocol for the electrophilic C-substitution (methylation, acylation, α-hydroxyalkylation, and carboxylation) of several 2-(N,N- dibenzylamino)alkan-1-ols via the carbamates 10 is reported. The stereochemistry of the lithiation is greatly influenced by the complexing diamine. The substrate-directed selection between the diastereotopic a-pro-R and pro-S protons in the TMEDA-assisted deprotonation is largely shifted towards pro-S-selectivity in the presence of (-)-sparteine (4). Each of both diastereomeric series is readily accessible in several cases.

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