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1038783-21-9

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1038783-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1038783-21-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,3,8,7,8 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1038783-21:
(9*1)+(8*0)+(7*3)+(6*8)+(5*7)+(4*8)+(3*3)+(2*2)+(1*1)=159
159 % 10 = 9
So 1038783-21-9 is a valid CAS Registry Number.

1038783-21-9Downstream Products

1038783-21-9Relevant articles and documents

A stereodivergent synthesis of β-hydroxy-α-methylene lactones via vinyl epoxides

Davoust, Marion,Cantagrel, Frederic,Metzner, Patrick,Briere, Jean-Francois

experimental part, p. 1981 - 1993 (2009/01/31)

A catalytic diastereoselective sulfonium ylide epoxidation of aldehydes furnished original vinyl epoxides, having an MBH backbone. These highly functionalised building blocks were used for a formal synthesis of the antibiotic conocandin, and opened up a stereodivergent route towards β-hydroxy-α-methylene lactones, core units of naturally occurring compounds. Under acidic conditions, the oxiranes were mainly transformed, with moderate to good yields, into trans β-hydroxy-α-methylene lactones. On the other hand, a user-friendly palladium-catalysed CO2 insertion and cyclisation sequence gave the cis β-hydroxy-α-methylene lactone counterparts along with an interesting cis-trans equilibration of the π-allyl intermediates. The Royal Society of Chemistry.

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