A Convenient Method for the Preparation of Primary and Symmetrical N,N′-Disubstituted Thioureas
作者:R. Jason Herr、J. Louise Kuhler、Harold Meckler、Chester J. Opalka
DOI:10.1055/s-2000-7607
日期:——
A convenient process for the preparation of both primary thioureas 2 and symmetrical N,N′-disubstituted thioureas 6 based on the condensation of amine hydrohalides 5 with potassium thiocyanate has been developed. This approach tolerates sterically bulky primary amine substrates (both chiral and achiral), and the products can usually be isolated by a simple filtration of the reaction mixture. This method is an especially attractive alternative for the synthesis of thioureas when the corresponding isothiocyanates are unavailable, or difficult to prepare. It is also worth noting that a wide variety of amine hydrohalides, which are used in this procedure, are commercially available.
Harries; Weiss, Justus Liebigs Annalen der Chemie, 1903, vol. 327, p. 383
作者:Harries、Weiss
DOI:——
日期:——
Elmore et al., Journal of the Chemical Society, 1955, p. 4388,4390
作者:Elmore et al.
DOI:——
日期:——
Harries; Weiss, Justus Liebigs Annalen der Chemie, vol. 327, p. 356,371
作者:Harries、Weiss
DOI:——
日期:——
Ultrashort acting hypnotic barbiturates
申请人:——
公开号:US20020013330A1
公开(公告)日:2002-01-31
The subject invention concerns novel compounds that are useful as ultrashort acting hypnotic barbiturates. Specifically exemplified are derivatives of barbituric and thiobarbituric acids. They are rapidly metabolized by blood and tissue enzymes to form polar metabolites with no hypnotic activity and which are rapidly eliminated.