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133128-31-1

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133128-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133128-31-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,1,2 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133128-31:
(8*1)+(7*3)+(6*3)+(5*1)+(4*2)+(3*8)+(2*3)+(1*1)=91
91 % 10 = 1
So 133128-31-1 is a valid CAS Registry Number.

133128-31-1Downstream Products

133128-31-1Relevant articles and documents

Generation of [β-(phenylsulfonyl)alkylidene]carbenes from hypervalent alkenyl- and alkynyliodonium tetrafluoroborates and synthesis of 1-(phenylsulfonyl)cyclopentenes

Ochiai, Masahito,Kunishima, Munetaka,Tani, Shohei,Nagao, Yoshimitsu

, p. 3135 - 3142 (2007/10/02)

Michael-type addition of benzenesulfinic acid to alkynyl(phenyl)iodonium tetrafluoroborates in methanol gives stereoselectively (Z)-(β-(phenylsulfonyl)alkenyl)iodonium tetrafluoroborates in high yields. [β-(Phenylsulfonyl)alkylidene]carbenes derived from

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