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1233510-32-1

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1233510-32-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233510-32-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,5,1 and 0 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1233510-32:
(9*1)+(8*2)+(7*3)+(6*3)+(5*5)+(4*1)+(3*0)+(2*3)+(1*2)=101
101 % 10 = 1
So 1233510-32-1 is a valid CAS Registry Number.

1233510-32-1Downstream Products

1233510-32-1Relevant articles and documents

Squaramide-Sulfonamide Organocatalyst for Asymmetric Direct Vinylogous Aldol Reactions

Sakai, Takaaki,Hirashima, Shin-ichi,Yamashita, Yoshifumi,Arai, Ryoga,Nakashima, Kosuke,Yoshida, Akihiro,Koseki, Yuji,Miura, Tsuyoshi

, p. 4661 - 4667 (2017/05/12)

Asymmetric direct vinylogous aldol reactions of furan-2(5H)-one with aldehydes in the presence of a catalytic amount of novel squaramide-sulfonamide organocatalyst resulted in the corresponding addition products with high to excellent enantioselectivities. This is the first successful report illustrating an example of highly stereoselective reactions using a squaramide-sulfonamide organocatalyst.

Asymmetric direct vinylogous aldol reaction of unactivated γ-butenolide to aldehydes

Yang, Yang,Zheng, Ke,Zhao, Jiannan,Shi, Jian,Lin, Lili,Liu, Xiaohua,Feng, Xiaoming

supporting information; experimental part, p. 5382 - 5384 (2010/09/05)

(Figure presented) The asymmetric direct vinylogous aldol reaction of unactivated γ-butenolide with aldehydes has been developed, giving the corresponding 5-(1′-hydroxy)butenolide derivatives in high yields (up to 93%) and enantioselectivities (up to 83%

Asymmetric vinylogous aldol reaction of silyloxy furans with a chiral organic salt

Singh, Ravi P.,Foxman, Bruce M.,Deng, Li

supporting information; experimental part, p. 9558 - 9560 (2010/08/20)

Despite their synthetic significance there is a general lack of asymmetric vinylogous aldol reactions that tolerate variations of both the silyloxy furans and aldehydes. We have developed a new chiral organic catalyst based on a carboxylate-ammonium salt prepared from a thiourea-amine and a carboxylic acid. This new catalyst enabled us to develop an efficient asymmetric vinylogous aldol reaction of unprecedented scope with respect to both 2-trimethylsilyloxy furans and aldehydes.

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