Journal of the Chemical Society. Perkin transactions I p. 2884 - 2889 (1981)
Update date:2022-08-04
Topics:
Au, Ting Keung
Baydar, Ahmet E.
Boyd, Gerhard V.
Treatment of eight phthalisoimidium perchlorates with sodium azide gave N-substituted o-carbamoylbenzoyl azides (2), which yielded o-carbamoylphenyl isocyanates (4) when heated.The isocyanates derived from tertiary phthalamic acids formed 4-dialkyl ammonio-1,4-dihydro-2H-3,1-benzoxazin-2-one perchlorates (8) by the action of perchloric acid and acetic anhydride; those containing secondary amide groups cyclised to 3-alkyl-quinazoline-2,4-(1H,3H)-diones (11) at rates depending on the size of the alkyl radicals.Tetrachloro- and tetrabromo-phthalic anhydride reacted with amines to yield the corresponding amic acids, their salts, of N-substituted 3-amino-4-hydroxyphthalides.Ring-chain isomerism was also observed in the case of the azides derived from two tertiary tetrachlorophthalamic acids.
View MoreChengda Pharmaceuticals Co., Ltd.
Contact:+86-573-84601188
Address:hengshan Road 5# in Jiashan, zhejiang
Shanghai Yuanye Bio-Technology Co., Ltd.
website:http://www.shyuanye.com
Contact:+86-21-61845781
Address:Building 6, No. 465, Changta Road,Songjiang District,Shanghai,China
Zhejiang Golden-Shell Pharmaceutical Co.,Ltd.
Contact:+86-576-87501888 / 87501988
Address:No.89 Zhongxing Road. Li'ao, Yuhuan, Zhejiang, China
Hangzhou jls Flame Retardants Chemical Co.,Ltd
Contact:+86-571-87250387/87250386
Address:MOGANSHAN RODA 1418# SHANGCHENG INDUSTRIAL PARK
Hangzhou J&H Chemical Co., Ltd.
website:http://www.jhechem.com/
Contact:+86-571-87396432
Address:No.200 Zhenhua Rd.Xihu Industrial Park, Hangzhou 310030, China
Doi:10.1016/S0040-4039(01)82942-7
(1981)Doi:10.1039/P19810003221
(1981)Doi:10.1002/hlca.201800049
(2018)Doi:10.1016/S0040-4039(01)92399-8
(1981)Doi:10.1021/ja00376a024
(1982)Doi:10.1016/j.bmc.2018.06.001
(2018)
