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93434-80-1

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93434-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 93434-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,4,3 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 93434-80:
(7*9)+(6*3)+(5*4)+(4*3)+(3*4)+(2*8)+(1*0)=141
141 % 10 = 1
So 93434-80-1 is a valid CAS Registry Number.

93434-80-1Relevant articles and documents

Mukaiyama reagent-promoted metal-free preparation of alkynyl sulfones and phosphonates under mild conditions

Qi, Danyang,Dong, Wanrong,Peng, Zhihong,Zhang, Yingjun,An

, (2019/08/01)

An efficient and mild route for the formation sulfur or phosphor-substituted alkynes was herein demonstrated. The Mukaiyama reagent-mediated transformation started from easily-accessible substrates without carbon-carbon triple bonds, and the reaction proceeded under mild conditions (room temperature) in a one-pot manner, requiring for no transition metal-catalysts. The practical protocol featured for good functional groups tolerance (up to 41 examples) and high efficiency (up to 91% yields) towards alkynyl sulfones and alkynyl phosphonates at low cost.

ALKYATION STUDIES OF 5-EXO-METHYLENE SUBSTITUTED ISOXAZOLIDINES

Padwa, Albert,Carter, Stephen P.,Chiacchio, Ugo,Kline, Donald N.,Perumattam, John

, p. 2639 - 2646 (2007/10/02)

1,3-Dipolar cycloaddition of nitrones to phenylsulphonylallene gives in high yield and with complete regiospecificity 5-methyleneisoxazolidines.These on treatment with base and subsequent reaction with electrophiles afford both α- and γ-substituted products.With methyl iodide as the electrophile, only the α-methylated product was isolated.In contrast, reaction of the 5-exo-methylene-4-phenylsulphonylisoxazolidine with allyl bromide afforded the γ-allyated product.Formation of this was shown to be via direct γ-attack, rather than by α-attack, followed by a 3,3-sigmatropic rearrangement.Further studies show that the product ratio is controlled by a sensitive interplay between thermodynamic and steric factors and is very dependent on the nature of the electrophile used.

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