Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 1931 - 1937 (1990)
Update date:2022-08-05
Topics:
Kazakov, P. V.
Odinets, I. L.
Antipin, M. Yu.
Petrovskii, P. V.
Kovalenko, L. V.
et al.
The Claisen condensation of 3-phosphorylated propionitriles with diethyl oxalate has been examined.The product of the condensation of 3-(methylethoxyphosphinyl)propionitrile, following hydrolysis, has been shown to be the enol form (Z-isomer) of 4-(methylhydroxyphosphinyl)-3-cyano-2-ketobutyric acid.On crystallization from water, the other isomers (the E-isomer of the enol or the keto-forms) were not isolated.Distillation of the products of silylation of the reaction mixture with hexamethyldisilazane gave both geometric isomers of the enol (Z and E).In aqueous solution, the enol gradually cyclizes to give 2-hydroxy-3-(methylhydroxyphosphinyl)citraconimide.
View MoreChongqing Changfeng Chemical Co., Ltd.
website:http://www.changfengchem.com
Contact:+86-23-67896333
Address:30th Floor, Longhu Ziduxingzuo Building A, 1st Branch,YuSong Rd., Yubei District, Chongqing, China
Leshan Kai Yada Photoelectric Technology Co., Ltd.,
website:http://www.kydmaterials.com
Contact:0833-5603116
Address:Airport road Jiajiang county, Sichuan province,China
Chongqing maohuan Chemicals Co., Ltd
website:http://www.bschem.com
Contact:+86 13996103726
Address:Chongqing Nan'an District Tu Town
Hangzhou Haiqiang Chemical Co.,Ltd.
Contact:+86-571-86960370
Address:Add: 5/F, Around Town North Road,No. 10, Hangzhou, Zhejiang,China
Wuxi Zuping Food Science And Technology Co.,LTD.
Contact:+86-510-87210822
Address:Guanlin town
Doi:10.1016/j.saa.2018.07.021
(2018)Doi:10.1021/ja962341b
(1996)Doi:10.1016/S0040-4020(01)98965-3
(1981)Doi:10.1016/S0022-1139(00)82316-7
(1981)Doi:10.1135/cccc19812263
(1981)Doi:10.1007/BF00503542
(1981)