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207676-65-1

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207676-65-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 207676-65-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,6,7 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 207676-65:
(8*2)+(7*0)+(6*7)+(5*6)+(4*7)+(3*6)+(2*6)+(1*5)=151
151 % 10 = 1
So 207676-65-1 is a valid CAS Registry Number.

207676-65-1Downstream Products

207676-65-1Relevant articles and documents

Facial diastereoselectivity in the photocycloaddition of chiral N-acyl enamines to benzaldehyde

Bach, Thorsten,Schroeder, Juergen,Brandl, Trixie,Hecht, Juergen,Harms, Klaus

, p. 4507 - 4520 (2007/10/03)

The facial diastereoselectivity in the photocycloaddition of the chiral N-acyl enamines 5, 6, and 7 to benzaldehyde has been studied. The anamide 5 derived from α-phenylethylamine (8) gave the corresponding oxetanes in good total yield (74%) but the diastereofacial selection was unsatisfactory (32% de). The N-vinyloxazolidinones 6 and 7 were prepared from the parent chiral 4-phenyl- (11) or 4-benzyloxazolidinone (15) by vinylation. Their photocycloadditons to benzaldehyde proceeded smoothly and yielded the corresponding oxetanes 12 and 16 (70-80%). A remarkable discrepancy in the course of the reaction was observed. Whereas oxetane formation from 6 proceeded with low diastereoselectivity (30% de) the Paterno-Buchi reaction of compound 7 gave predominantly one diastereoisomer 16a (62% de) the relative configuration of which was opposite to the major diastereomer 12a obtained from oxazolidinone 6.

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