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1374637-29-2

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1374637-29-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1374637-29-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,7,4,6,3 and 7 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1374637-29:
(9*1)+(8*3)+(7*7)+(6*4)+(5*6)+(4*3)+(3*7)+(2*2)+(1*9)=182
182 % 10 = 2
So 1374637-29-2 is a valid CAS Registry Number.

1374637-29-2Downstream Products

1374637-29-2Relevant articles and documents

Highly enantioselective synthesis of spiro[cyclohexanone-oxindoles] and spiro[cyclohexanone-pyrazolones] by asymmetric cascade [5+1] double Michael reactions

Wu, Bin,Chen, Jian,Li, Mei-Qiu,Zhang, Jin-Xin,Xu, Xiao-Ping,Ji, Shun-Jun,Wang, Xing-Wang

experimental part, p. 1318 - 1327 (2012/04/11)

The asymmetric catalytic synthesis of naturally occurring and biologically active spiro compounds is a challenge for modern chemical methodology. Here we report the construction of spiro compounds through cascade [5+1] double Michael reactions between divinyl ketones and N-unprotectedoxindoles or N-phenyl-protected pyrazolones catalyzed by a combination of the easily available 9-amino-9-deoxy-epi-quinine with N-Boc-D-phenylglycine. The desired multistereogenic spiro[cyclohexanone-oxindoles and -pyrazolones] were obtained with high yields (up to 98 %) andstereoselectivities (up to >20:1 dr, 99 % ee). An efficient approach to spiro compounds through cascade [5+1] double Michael reactions between divinyl ketones and oxindoles or N-protected pyrazolones in the presence of 9-amino-9-deoxy-epi-quinine and N-Boc-D-phenylglycine is reported. Multistereogenic spiro[cyclohexanone- oxindoles and -pyrazolones] are obtained with high yields (up to 98 %) and stereoselectivities (up to >20:1 dr, 99 % ee). Copyright

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