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1942-34-3

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1942-34-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1942-34-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,4 and 2 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1942-34:
(6*1)+(5*9)+(4*4)+(3*2)+(2*3)+(1*4)=83
83 % 10 = 3
So 1942-34-3 is a valid CAS Registry Number.

1942-34-3Relevant articles and documents

Chiral cyclopentadienylruthenium sulfoxide catalysts for asymmetric redox bicycloisomerization

Trost, Barry M.,Ryan, Michael C.,Rao, Meera

, p. 1136 - 1152 (2016)

A full account of our efforts toward an asymmetric redox bicycloisomerization reaction is presented in this article. Cyclopentadienylruthenium (CpRu) complexes containing tethered chiral sulfoxides were synthesized via an oxidative [3 + 2] cycloaddition reaction between an alkyne and an allylruthenium complex. Sulfoxide complex 1 containing a p-anisole moiety on its sulfoxide proved to be the most efficient and selective catalyst for the asymmetric redox bicycloisomerization of 1,6- and 1,7-enynes. This complex was used to synthesize a broad array of [3.1.0] and [4.1.0] bicycles. Sulfonamide- and phosphoramidate-containing products could be deprotected under reducing conditions. Catalysis performed with enantiomerically enriched propargyl alcohols revealed a matched/mismatched effect that was strongly dependent on the nature of the solvent.

An efficient and novel method for the synthesis of sulfinate esters under solvent-free conditions

Hajipour, Abdol R.,Falahati, Ali R.,Ruoho, Arnold E.

, p. 2717 - 2719 (2007/10/03)

The present letter describes a reliable one-stage process for the preparation of sulfinate esters from the corresponding sulfinic acid and alcohols in the presence of N,N′-dicyclohexylcarbodiimide (DCC) under solvent-free conditions.

An improved and efficient procedure for the preparation of chiral sulfinates from sulfonyl chloride using triphenylphosphine

Watanabe, Yoshihiko,Mase, Nobuyuki,Tateyama, Moto-Aki,Toru, Takeshi

, p. 737 - 745 (2007/10/03)

An improved procedure of the Sharpless method for the preparation of chiral sulfinates by triphenylphosphine is described. A mixture of sulfonyl chlorides and diacetone-D-glucose or l-menthol in the presence of triethylamine was treated with triphenylphos

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