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94162-44-4

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94162-44-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 94162-44-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,1,6 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 94162-44:
(7*9)+(6*4)+(5*1)+(4*6)+(3*2)+(2*4)+(1*4)=134
134 % 10 = 4
So 94162-44-4 is a valid CAS Registry Number.

94162-44-4Relevant articles and documents

Intramolecular C-H insertion by an alkylidene carbene: Diastereoselective synthesis of a taxol A ring synthon

Taber,Walter,Meagley

, p. 6014 - 6017 (2007/10/02)

The first stage in a proposed total synthesis of the clinically effective anticancer agent taxol 1 is reported. A key step in this synthesis is the development of a new procedure for the generation and cyclization of the alkylidene carbene derived from ketone 9, to give cyclopentene 16 (formation of three new carbon-carbon bonds) in 72% yield. Ozonolysis of 16 followed by aldol condensation furnished the crystalline cyclohexenone 4.

REARRANGEMENTS OF N-ACYL-2-AZA-1,5-HEXADIENES: APPLICATION TO SYNTHESES OF TRAECHELANTHAMIDINE AND SUPINIDINE

Hart, David J.,Yang, Teng-Kuei

, p. 2761 - 2764 (2007/10/02)

Efficient syntheses of the pyrrolizidine bases traechelanthamidine (4) and supinidine (5) via an N-acyliminium ion rearrangement-cyclization are described.

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