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284663-48-5

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284663-48-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 284663-48-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,4,6,6 and 3 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 284663-48:
(8*2)+(7*8)+(6*4)+(5*6)+(4*6)+(3*3)+(2*4)+(1*8)=175
175 % 10 = 5
So 284663-48-5 is a valid CAS Registry Number.

284663-48-5Relevant articles and documents

Highly regioselective synthesis of 2,3,4-trisubstituted 1H-pyrroles: A formal total synthesis of lukianol A

Liu, Jian-Hui,Yang, Qing-Chuan,Mak, Thomas C. W.,Wong, Henry N. C.

, p. 3587 - 3595 (2007/10/03)

A combined use of α-lithiation and nucleophilic substitutions of N,N- dimethyl 3,4-bis(trimethylsilyl)-1H-pyrrole-1-sulfonamide 8c led to several 2-substituted 3,4-bis(trimethylsilyl)-1H-pyrrole-1-sulfonamides. Utilizing the β-effect of a trimethylsilyl group, a highly regioselective synthesis of 2,3,4-trisubstituted 1H-pyrroles 23 and 34 was accomplished. The marine natural product lukianol A (3) was prepared utilizing this strategy.

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