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344250-14-2

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344250-14-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 344250-14-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,2,5 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 344250-14:
(8*3)+(7*4)+(6*4)+(5*2)+(4*5)+(3*0)+(2*1)+(1*4)=112
112 % 10 = 2
So 344250-14-2 is a valid CAS Registry Number.

344250-14-2Relevant articles and documents

Enantioselective Hydroazidation of Trisubstituted Non-Activated Alkenes

Meyer, Daniel,Renaud, Philippe

, p. 10858 - 10861 (2017/08/30)

A one-pot procedure for the enantioselective hydroazidation of non-activated trisubstituted alkenes is described. Hydroboration with monoisopinocampheylborane (IpcBH2) provides dialkylboranes that are in situ selectively converted into monoalkyl-substituted catecholboranes; these undergo radical azidation upon treatment with benzenesulfonyl azide and a radical initiator. Enantiomerically enriched azides were thus obtained in yields of 59–81 % and enantioselectivities of up to 94:6 e.r. (98:2 e.r. if the intermediate dialkylborane is purified by crystallization). A rapid access to enantiomerically pure (+)-rodocaine is also described. The use of other arenesulfonyl radical traps enables enantioselective hydroallylation, hydrosulfanylation, and hydrobromination reactions with yields of 71–86 %.

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