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138751-07-2

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138751-07-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138751-07-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,5 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 138751-07:
(8*1)+(7*3)+(6*8)+(5*7)+(4*5)+(3*1)+(2*0)+(1*7)=142
142 % 10 = 2
So 138751-07-2 is a valid CAS Registry Number.

138751-07-2Relevant articles and documents

The stereoselective synthesis of oxetanes; exploration of a new, Mitsunobu-style procedure for the cyclisation of 1,3-diols

Christlieb,Davies,Eames,Hooley,Warren

, p. 2983 - 2996 (2007/10/03)

A solution of 2-methyl-3-[1-(phenylsulfanyl)cyclohexyl]propane-1,3-diol 1 in toluene treated with triphenyl-phosphine, Ziram 2 and DEAD, gave 3-methyl-2-[1-(phenylsulfanyl)cyclohexyl]oxetane 3 in 85% yield. A mechanistic study has been undertaken, optimal conditions have been found and the range of substrates for which the reaction is useful has been explored. We include the results of an X-ray study which shows that compound 33 (the oxidation product of diol 1) is a sulfone rather than a sulfoxide as previously reported.

Asymmetric synthesis of spirocyclic pyrrolidines and tetrahydrofurans by chiral aldol reactions and phenylthio migration

Chibale,Warren

, p. 6645 - 6648 (2007/10/02)

Highly enantioselective aldol reactions of the boron enolate of (S)-N-propionyl-4-(phenylmethyl)-2-oxazolidinone with α-phenylthio cycloalkanecarbaldehydes were achieved. Cyclisation of the chiral phenylthiosulphonamide and diols gave the title compounds in excellent yields and enantiomeric excess.

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