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156203-61-1

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156203-61-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156203-61-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,2,0 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156203-61:
(8*1)+(7*5)+(6*6)+(5*2)+(4*0)+(3*3)+(2*6)+(1*1)=111
111 % 10 = 1
So 156203-61-1 is a valid CAS Registry Number.

156203-61-1Relevant articles and documents

Catalytic method for the reduction of lactones to lactols

Verdaguer, Xavier,Berk, Scott C.,Buchwald, Stephen L.

, p. 12641 - 12642 (1995)

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A new strategy for efficient synthesis of medium and large ring lactones without high dilution or slow addition

Zhao, Wanxiang,Li, Zigang,Sun, Jianwei

supporting information, p. 4680 - 4683 (2013/05/09)

We have developed an efficient method for medium and large ring lactone synthesis by a conceptually different ring-expansion strategy. The design of an unprecedented ring conjunction mode of oxetene, combined with the appropriate choice of a Lewis acid promoter and an additive, constitutes the key components of the new process. Enabled by this new approach, the reaction does not require high dilution or slow addition.

Convenient Two-Step Conversion of Lactones into Cyclic Ethers

Hansen, Marcus C.,Verdaguer, Xavier,Buchwald, Stephen L.

, p. 2360 - 2361 (2007/10/03)

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