Synthesis of some pyrazolo[1,5-c][1,3]benzoxazines and a new 5H-pyrazolo[1,5-c][1,3,2]benzoxazaphosphorine ring system

被引：6
|
作者：
Svetlik, J
Pronayova, N
Kubista, J
机构：
[1] Comenius Univ, Fac Pharm, Dept Pharmaceut Anal & Nucl Pharm, SK-83232 Bratislava, Slovakia
[2] Slovak Univ Technol Bratislava, NMR Lab, Bratislava 81237, Slovakia
[3] J Heyrovsky Inst Phys Chem, Prague 18223, Czech Republic
来源：
JOURNAL OF HETEROCYCLIC CHEMISTRY | 2005年 / 42卷 / 06期
关键词：
D O I：
10.1002/jhet.5570420616
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
Condensations of 5-(2-hydroxyphenyl)pyrazoline 3a with 4-carboxybenzaldehyde, glyoxylic acid and N,N'-carbonyldiimidazole leading to pyrazolobenzoxazine derivatives were studied. The observed diastereoselectivity is discussed. Reaction of 3a with Lawesson reagent gave rise to a new 5H-pyrazolo[1,5-c]-[1,3,2]benzoxazaphosphorine heterocyclic system.
引用
收藏
页码：1143 / 1147
页数：5
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