Bifunctionalized Allenes, Part IX: An Efficient Method for Regioselective Synthesis of 4-Heteroatom-Functionalized Allenecarboxylates
作者:Ivaylo K. Ivanov、Ivaylo D. Parushev、Valerij Ch. Christov
DOI:10.1002/hc.21096
日期:2013.7
An efficient method for regioselective synthesis of 4-heteroatom-functionalized allenecarboxylates by an atom economical [2,3]-sigmatropic rearrangement of the mediated 2-heteroatom-functionalized alk-3-ynecarboxylates is described. Alkyl 4-(dimethoxyphosphoryl), (diphenylphosphinoyl), (benzenesulfinyl), or (methanesulfonyl)-alka-2,3-dienoates can be readily prepared via reactions of alkyl 2-hydroxy-alk-3-ynoates
描述了通过介导的 2-杂原子官能化 alk-3-ynecarboxylates 的原子经济 [2,3]-sigmatropic 重排来区域选择性合成 4-杂原子官能化丙二烯羧酸酯的有效方法。4-(二甲氧基磷酰基)、(二苯基膦酰基)、(苯亚磺酰基)或(甲磺酰基)-烷基-2,3-二烯酸烷基酯可以通过2-羟基-烷基-3-炔酸烷基酯与二甲基氯亚磷酸酯、氯代二苯基膦、苯硫烷基的反应容易地制备在碱的存在下,分别为氯化物或甲亚磺酰氯。