Facile Preparation of 3-(1-Piperazinyl)-1H-indazoles
作者:Vincent Leroy、George E. Lee、Jiang Lin、Sandra H. Herman、Thomas B. Lee
DOI:10.1021/op0002242
日期:2001.3.1
Pre-clinical evaluation of a potential antipsychotic agent required a convenient synthesis of 3-(1-piperazinyl)-1H-indazole derivatives. Improvements of the original preparation provided a five-step sequence to an unsubstituted piperazine intermediate, with a 67% overall yield. All intermediates were isolated by filtration.
Process Improvements for the Preparation of Kilo Quantities of a Series of Isoindoline Compounds
作者:Timothy J. Watson、Timothy A. Ayers、Nik Shah、David Wenstrup、Mark Webster、David Freund、Stephen Horgan、James P. Carey
DOI:10.1021/op020225p
日期:2003.7.1
A series of isoindoline analogues with either an indazole (HMR 2934, HMR 2651) or benzisoxazole (HMR 2543) appendage were prepared for the proposed treatment of psychiatric disorders such as obsessive compulsive disorder and attention deficit disorder. The isoindoline compounds were prepared by reduction of the corresponding phthalimides with LiAlH4. One compound was not chiral, and the other two required