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1346132-37-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1346132-37-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,6,1,3 and 2 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1346132-37:
133 % 10 = 3
So 1346132-37-3 is a valid CAS Registry Number.

1346132-37-3Relevant articles and documents

Asymmetric organocatalytic intramolecular aza-michael addition of enone carbamates: Catalytic enantioselective access to functionalized 2-substituted piperidines

Liu, Jian-Dong,Chen, Ying-Chun,Zhang, Guo-Biao,Li, Zhi-Qiang,Chen, Peng,Du, Ji-Yuan,Tu, Yong-Qiang,Fan, Chun-An

, p. 2721 - 2730 (2011)

The synthetically useful functionalized 2-substituted piperidines containing a lateral ketone group have been strategically accessed via an organocatalytic enantioselective intramolecular aza-Michael addition of enone carbamates, in which a novel internal substrate combination of the enone moiety as Michael acceptor and the carbamate moiety as Michael donor was revealed in asymmetric bifunctional organocatalysis. This heteroatom conjugate addition, which was realized by using a catalytic chiral Cinchona-based primary-tertiary diamine and an achiral Bronsted acid, mostly proceeded in high yield and good to excellent stereocontrol (up to 99% ee). This reaction provides an alternative catalytic asymmetric method for installing the stereogenic nitrogen-containing carbon center in functionalized 2-substituted piperidines, leading to the development of a straightforward and expeditious synthesis of some naturally occurring bioactive 2-substituted piperidine alkaloids. Copyright

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