Addition of Chloroprene Grignards to Aromatic Aldehydes: Synthesis of Homoallenyl Alcohols
作者:Arne G. A. Geissler、Bernhard Breit
DOI:10.1021/acs.orglett.1c00527
日期:2021.4.2
A general procedure for the one-pot synthesis of racemic homoallenyl alcohols from the corresponding aldehyde and chloroprene-derived Grignards is described. Employing bis[2-dimethylaminoethyl]ether (BDMAEE) as an additive at low temperatures shifts the selectivity of the chloroprene Grignard addition to aldehydes such that it is almost exclusive toward allene formation. In a set of follow-up experiments
描述了由相应的醛和氯丁二烯衍生的格氏试剂一锅合成外消旋同烯丙基醇的一般程序。在低温下使用双[2-二甲基氨基乙基]醚(BDMAEE)作为添加剂会改变氯丁二烯格利雅(Grignard)除醛以外的选择性,从而几乎不影响丙二烯的形成。在一组后续实验中,已经证明了用于进一步衍生化的简单且更复杂的方法,从而可以快速访问更复杂的结构。