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221526-49-4

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221526-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221526-49-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,5,2 and 6 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221526-49:
(8*2)+(7*2)+(6*1)+(5*5)+(4*2)+(3*6)+(2*4)+(1*9)=104
104 % 10 = 4
So 221526-49-4 is a valid CAS Registry Number.

221526-49-4Relevant articles and documents

Practical synthesis of a 3, 4, 4a, 5, 8, 8a-hexahydro-2H-isoquinoline-1, 6-dione ring system by the Diels-Alder reaction of an optically active dienophile, a 5, 6-dihydro-1H-pyridin-2-one derivative, with siloxydiene

Nakagawa, Masako,Uchida, Hideharu,Ono, Koji,Kimura, Yoshiyuki,Yamabe, Mariko,Watanabe, Takeshi,Tsuji, Riichiro,Akiba, Masakatsu,Terada, Yukiyoshi,Nagaki, Dai,Ban, Sachiko,Miyashita, Naoki,Kano, Takuya,Theeraladanon, Chumpol,Hatakeyama, Keisuke,Arisawa, Mitsuhiro,Nishida, Atsushi

, p. 721 - 733 (2007/10/03)

An efficient method for preparing chiral 3-substituted-5, 6-dihydro-1H-pyridin-2-one (1) in large scale, based on a modification of our previous method, is described. The large scale Diels-Alder reaction of 1 with siloxydiene (2) to synthesize hexahydrois

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