Facile Synthesis of 6-Trichloromethylpterin and 2-Chloro-3-trichloromethylquinoxaline along with a Library of Trichloromethyl Heterocycles Using<i>N</i>-Chlorosuccinimide and Triphenyl Phosphine
作者:Shyamaprosad Goswami、Annada C. Maity、Hoong-Kun Fun
DOI:10.1246/cl.2007.552
日期:2007.4.5
A general synthesis of 6-trichloromethylpterin, 2-chloro-3-trichloromethylquinoxaline and 2-amino-7-trichloromethyl-1,8-naphthyridine along with a series of trichloromethyl heterocycles (1–11) has been reported in one-pot mild neutral condition in good yield. This method is compared with the usual method using phosphorus pentachloride in phosphorus oxychloride.
FLUORINATING AGENT, PROCESS FOR PRODUCING THE SAME, AND USE THEREOF
申请人:Mitsui Chemicals, Inc.
公开号:EP1072576A1
公开(公告)日:2001-01-31
The invention disclose a hydrogen fluoride containing composition comprising hydrogen fluoride and a compound which is liquid in the standard state (25 °C, 1 atmosphere) and has a boiling point of 120 °C or more and pka of 12 or more at 25 °C, and use of the composition for a fluorination agent.
The compound which can be preferably used is represented by the formula (1):
wherein R1 to R4 are a substituted or unsubstituted alkyl or aryl group and can be the same or different, and R1 or R2 or R3 and R4 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom, or R1 and R3 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom.
The fluorination agent of the invention exerts effect with a similar reaction mechanism to hydrogen fluoride, can be applied to the halogen exchange reaction of a halogen containing organic compound, and can produce a fluorine containing compound with safety and ease without specific equipment or technique.
A new methodology permitting the chlorination of different alpha-methylated nitrogen containing heterocycles into N-alpha-trichloromethylated derivatives is described here. The combination of microwave technology with a PCl5/POCl3 protocol has allowed to reach trichloromethyl derivatives with high yields in a few minutes. (c) 2006 Elsevier Ltd. All rights reserved.
Cartwright, David; Ferguson, John R.; Giannopoulos, Thomas, Journal of the Chemical Society. Perkin transactions I, 1995, # 20, p. 2595 - 2598
作者:Cartwright, David、Ferguson, John R.、Giannopoulos, Thomas、Varvounis, George、Wakefield, Basil J.
DOI:——
日期:——
A method of making indolizinone-dyes, novel indolizinone-dyes obtained according to the process, method of producing images with oxoindolizinone-dyes and radiation sensitive element to produce the images
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)