Nitroalkenylferrocene. V. New Reactions of α-Halonitroolefins in the Presence of Sodium Alkoxides
作者:Mikio Shiga、Masaaki Tsunashima、Hiromichi Kono、Izumi Motoyama、Kazuo Hata
DOI:10.1246/bcsj.43.841
日期:1970.3
to be useful for obtaining asymmetric nitroacetals (9) with different alkoxy groups. The reaction mechanism was discussed by postulating the intervention of a nitrocarbene (12) and β-alkoxynitroolefin (8). The intermediacy of the nitrocarbene was supported by an experiment using vinylferrocene as a carbene scavenger.
研究了 1-iodo-2-ferrocenyl-1-nitroethylene (1) 和 β-bromo-β-nitro苯乙烯 (5) 与各种钠醇盐的反应。在过量醇盐存在下的反应得到硝基酮(2)和(6)以及硝基缩醛(3)和(7)。硝基缩醛在氮气氛中的热分解得到 β-烷氧基硝基烯烃 (8),发现其可用于获得具有不同烷氧基的不对称硝基缩醛 (9)。通过假设硝基碳烯(12)和β-烷氧基硝基烯烃(8)的干预来讨论反应机理。硝基碳烯的中间体得到了使用乙烯基二茂铁作为碳烯清除剂的实验的支持。