Hypervalent-iodine(<scp>iii</scp>) oxidation of hydrazones to diazo compounds and one-pot nickel(<scp>ii</scp>)-catalyzed cyclopropanation
作者:Haixuan Liu、Yunyang Wei、Chun Cai
DOI:10.1039/c5nj02378e
日期:——
A one-pot process for the catalytic cyclopropanation of various alkenes with unsubstituted hydrazones is described. Iodosobenzene (PhIO) was found to be a competent oxidant of hydrazones to diazo compounds. Ni(OH)2 was chosen as an effective and cheap metal catalyst. The cyclopropane products can be generated efficiently (5 min–4 h) in moderate to good yields (42–91%) under mild (80 °C) and neat conditions
描述了用未取代的酮对各种烯烃进行催化环丙烷化的一锅法。发现碘代苯(PhIO )是到重氮化合物的有效氧化剂。选择Ni(OH)2作为有效且廉价的金属催化剂。在温和(80°C)和纯净的条件下,可以以中等到良好的收率(42–91%)有效地产生环丙烷产物(5分钟至4小时)。