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1004987-40-9

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1004987-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1004987-40-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,4,9,8 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1004987-40:
(9*1)+(8*0)+(7*0)+(6*4)+(5*9)+(4*8)+(3*7)+(2*4)+(1*0)=139
139 % 10 = 9
So 1004987-40-9 is a valid CAS Registry Number.

1004987-40-9Downstream Products

1004987-40-9Relevant articles and documents

Oxazaborolidinone-catalyzed enantioselective Diels-Alder reaction of acyclic α,β-unsaturated ketones

Singh, Ram Shanker,Adachi, Shinya,Tanaka, Fumi,Yamauchi, Toyonao,Inui, Chieko,Harada, Toshiro

, p. 212 - 218 (2008/09/18)

(Chemical Equation Presented) allo-Threonine-derived O-acyl-β-phenyl- oxazaborolidinones are demonstrated to be powerful and highly enantioselective Lewis acid catalysts for the Diels-Alder reaction of simple acyclic enone dienophiles, expanding the scope of ketone dienophiles and dienes. With 10 to 20 mol % of catalyst, the Diels-Alder adducts are obtained in 76-98% ee with high endo-selectivity. The catalyst exhibits high activity for the reaction with the less reactive β-substituted dienophiles and the less reactive 1,3-cycohexadiene and 1,3-butadiene derivatives. The application of the catalysts to the Diels-Alder reaction of furan is also described.

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