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139396-45-5

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139396-45-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139396-45-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,3,9 and 6 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139396-45:
(8*1)+(7*3)+(6*9)+(5*3)+(4*9)+(3*6)+(2*4)+(1*5)=165
165 % 10 = 5
So 139396-45-5 is a valid CAS Registry Number.

139396-45-5Downstream Products

139396-45-5Relevant articles and documents

Highly Enantioselective 1,2-Addition of 2-[(Trimethylsilyl)oxy]furan to Aldehydes: Application to Muricatacin Synthesis

Szlosek, Magali,Franck, Xavier,Figadere, Bruno,Cave, Andre

, p. 5169 - 5172 (1998)

TMSOF 2-[(trimethylsilyl)oxy]furan has been used in an enantioselective aldol reaction for the first time. Indeed, addition of TMSOF to achiral aldehydes, in the presence (R)-1,1-bi-2-naphthol (Binol), gave the corresponding butenolides with moderate diastereomeric ratios (dr = 60%) and ee's between 60 and 90%. Application of this reaction to the total synthesis of annonaceous muricatacin in only two steps (in regards to the numerous multistep syntheses published so far) illustrated the efficiency of this strategy.

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