作者:Gábor Tóth、Albert Lévai、Áron Szöllősy、Helmut Duddeck
DOI:10.1016/s0040-4020(01)80329-x
日期:1993.1
that this cycloaddition is regio- and stereoselective affording trans- and cis- spiro-1-pyrazolines. Spiro-1-pyrazolines were converted into spiro-2-pyrazolines on acid-catalysed isomerization. Conformation and relative configuration of compounds prepared has been elucidated by various one- and two-dimensional n.m.r. methods.
通过E-和Z -3-芳基苯并二氢苯并二氢吡喃酮,-1-硫代苯并二氢吡喃酮,-黄烷酮,-1-硫代黄烷酮以及2-苄叉基-1-茚满酮,- 1-苯并亚砜与重氮甲烷。已经发现,这是环区域选择性和立体选择性得到反式-与顺式-螺1吡唑啉。在酸催化的异构化作用下,将螺-1-吡唑啉转化为螺-2-吡唑啉。通过各种一维和二维核磁共振方法已经阐明了所制备化合物的构象和相对构型。