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71624-75-4

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71624-75-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71624-75-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,2 and 4 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 71624-75:
(7*7)+(6*1)+(5*6)+(4*2)+(3*4)+(2*7)+(1*5)=124
124 % 10 = 4
So 71624-75-4 is a valid CAS Registry Number.

71624-75-4Relevant articles and documents

A Simple Method for Producing Cycloalkenyllithiums from Cycloalkanones via Reductive Lithiation of Enol Phenyl Thioethers

Cohen, Theodore,Doubleday, Mary Dosch

, p. 4784 - 4786 (2007/10/02)

Cyclohexenyl, cycloheptenyl, and cyclooctenyl phenyl sulfides, readily prepared from the corresponding cycloalkanones, are reductively lithiated by lithium p,p'-di-tert-butylbiphenylide to produce cycloalkenyllithiums in good yields.

REACTIONS OF VINYLSILANES WITH LEWIS ACID-ACTIVATED IODOSYLBENZENE: STEREOSPECIFIC SYNTHESIS OF VINYLIODONIUM TETRAFLUOROBORATES AND THEIR REACTIONS AS HIGHLY ACTIVATED VINYL HALIDES

Ochiai, Masahito,Sumi, Kenzo,Takaoka, Yoshikazu,Kunishima, Munetaka,Nagao, Yoshimitsu,et al.

, p. 4095 - 4112 (2007/10/02)

Alkenyl(phenyl)iodonium tetrafluoroborates 3 were synthesized from alkenylsilanes 1 by the reaction with iodosylbenzene and boron trifluoride-diethyl ether or triethyloxonium tetrafluoroborate.The reaction proceeds stereospecifically with retention of configuration of 1.X-ray diffraction analysis of (4-tert-butylcyclohexenyl)phenyliodonium tetrafluoroborate (3b) revealed the highly ionic structure with the distorted T-shape arrangement.Iodonium salts 3 behave like the highly activated species of vinyl iodides due to the high leaving ability of the iodine(III) substituents.Thus, a variety of substituted olefins including α-cyano and α-nitro olefins, vinyl sulfides, vinyl halides and α,β-unsaturated esters, were synthesized from 3 under mild conditions.A ligand coupling mechanism via the formation of 10-I-3 intermediate 27 containing a copper(III) ligand is proposed for the substitutions of 3 with nucleophiles.

VINYLIODONIUM SALTS: THEIR STEREOSPECIFIC SYNTHESIS AND REACTIONS AS THE ACTIVATED VINYL HALIDES

Ochiai, Masahito,Sumi, Kenzo,Nagao, Yoshimitsu,Fujita, Eiichi

, p. 2351 - 2354 (2007/10/02)

Vinyliodonium salts 2 were synthesized from vinylsilanes 1 by the reaction with iodosylbenzene and triethyloxonium tetrafluoroborate.The reaction occurs stereospecifically with retention of configuration.Vinyliodonium salts 2 are highly effective as the activated species of vinyl iodides.Thus, a variety of substituted olefins including α-cyano and α-nitro olefins, vinyl sulfides, vinyl halides, and α,β-unsaturated esters, were prepared from 2 under mild reaction conditions.

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