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172877-31-5

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172877-31-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172877-31-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,8,7 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 172877-31:
(8*1)+(7*7)+(6*2)+(5*8)+(4*7)+(3*7)+(2*3)+(1*1)=165
165 % 10 = 5
So 172877-31-5 is a valid CAS Registry Number.

172877-31-5Downstream Products

172877-31-5Relevant articles and documents

Stereocontrolled Intramolecular Michael-Aldol Reaction Mediated with Bu2BOTf and (TMS)2NH

Ihara, Masataka,Taniguchi, Takahiko,Yamada, Masami,Tokunaga, Yuji,Fukumoto, Keiichiro

, p. 8071 - 8074 (2007/10/02)

Treatment of keto-esters 1-5 with Bu2BOTf and (TMS)2NH caused a tandem Michael-aldol reaction to give polycyclic cyclobutanes 6-10 with high stereoselection.It was proved that the reaction was accelerated by the addition of Bu4NI.

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