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1620408-96-9

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1620408-96-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1620408-96-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,4,0 and 8 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1620408-96:
(9*1)+(8*6)+(7*2)+(6*0)+(5*4)+(4*0)+(3*8)+(2*9)+(1*6)=139
139 % 10 = 9
So 1620408-96-9 is a valid CAS Registry Number.

1620408-96-9Relevant articles and documents

Total synthesis of tetrahydrolipstatin and stereoisomers via a highly regio- and diastereoselective carbonylation of epoxyhomoallylic alcohols

Mulzer, Michael,Tiegs, Brandon J.,Wang, Yanping,Coates, Geoffrey W.,O'Doherty, George A.

supporting information, p. 10814 - 10820 (2014/08/18)

A concise enantioselective synthesis of tetrahydrolipstatin (THL) and seven stereoisomers has been achieved. The synthesis of THL was accomplished in 10 steps and 31% overall yield from an achiral ynone. Key to the success of the approach is the use of a bimetallic [Lewis acid]+[Co(CO)4]- catalyst for a late-stage regioselective carbonylation of an enantiomerically pure cis-epoxide to a trans-β-lactone. The success of this route to THL and its stereoisomers also demonstrated the practicality of the carbonylation catalyst for complex molecule synthesis as well as its functional group compatibility.

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