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141666-30-0

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141666-30-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141666-30-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,6,6 and 6 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 141666-30:
(8*1)+(7*4)+(6*1)+(5*6)+(4*6)+(3*6)+(2*3)+(1*0)=120
120 % 10 = 0
So 141666-30-0 is a valid CAS Registry Number.

141666-30-0Downstream Products

141666-30-0Relevant articles and documents

Reactions of Trialkylsilyl Trifluoromethanesulfonates XI. - Synthesis of α-Oxocarboxylic Acid Derivatives from 2-O-Functionalized Trimethylsilyl Ketene Acetals

Simchen, Gerhard,Siegl, Gerald

, p. 607 - 614 (2007/10/02)

The cyclic ketene acetals 3, 5 are prepared from the dioxolanone 2 resp. the oxazolidinediones 4 by silylation with trimethylsilyl triflate (1)/triethylamine.In an aldol addition/Peterson olefination reaction catalysed by 1 the ketene acetals 3, 5 yield the (E/Z)-benzylidene derivatives 7, 12, 13 in reaction with aromatic aldehydes 6.In a side reaction the α-(trimethylsilyl)benzylidene derivatives 8 are formed from 3 and 6.Compounds 7 can be hydrolysed to yield α-ketocarboxylic acids 14.The latter are also obtained via β-elimination of trimethylsilanol from 2,3-bis(trimethylsiloxy)carboxylic acid anhydride/DMAP/pyridine. Key Words: 1,3-Dioxolanes / 1,3-Oxazolidines / α-Oxocarboxylic acids

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