Monatshefte fur Chemie p. 915 - 922 (1983)
Update date:2022-09-26
Topics:
Leistner, Siegfried
Hentschel, Karin
Wagner, Guenther
The substituted 1,3,4-thiadiazoles 4-14 were prepared in one step by reaction of 3,1 benzothiazin-2,4-dithiones 1 and 3 with RCONHNH2 (R=Me, Ph, substituted Ph, 4-Pyridyl, CONHNH2).Reaction of 1 with RCONHNH2 in the presence of HO(-) leads to substituted quinazolin-2,4-dithiones 18-20.Under the action of CS2 the yield of 19 and 20 increases.Possible reaction mechanisms are discussed. - keywords: 2H-3,1-Benzothiazin-2,4(1H)-dithione; Carbocyclic acid hydrazides; Quinazolin-2,4(1H,3H)-dithione; Ring transformation; 1,3,4-Thiadiazoles
View MoreTianjin Pharmacn Medical Technology Co.,Ltd.
Contact:86-22-60122566ext.866(English),23359620
Address:Green Industrial Base, 6 Haitaifazhan Sixth Rd., Huayuan Industrial Area, Tianjin, 300384, China
Hangzhou Showland Technology Co., Ltd.
Contact:86-571-88920516
Address:ROOM2118,NO.553,WENSAN ROAD,HANGZHOU,CHINA
SHANDONG CREDAGRI CHEMICAL CO., LTD.
Contact:+86-531-88872050
Address:ROOM 601A, BUILDING 2, SHUNTAI SQUARE, NO. 2000 SHUNHUA ROAD, HI-TECH DEVELOPMENT ZONE, JINAN, CHINA.
Landz International Company Ltd.
Contact:0086-21-58891610
Address:985 Dongfang Road, Pudong, Shanghai 200122 China
JiangXi Keyuan Biopharma Co., LTD.
Contact:+86-563-6833666
Address:Guangde Fine Chemical Zone, Anhui Province, China
Doi:10.1021/ja01315a030
(1935)Doi:10.1021/ja0341844
(2003)Doi:10.1246/cl.150896
(2016)Doi:10.1039/b210467a
(2003)Doi:10.1016/S0022-328X(00)89622-9
(1975)Doi:10.1039/b208910f
(2003)