作者:P.A.A. Klusener、L. Tip、L. Brandsma
DOI:10.1016/s0040-4020(01)96114-9
日期:1991.3
Isoprene has been metalated in tetrahydrofuran with an excess of sterically hindered potassium dialkylamides, prepared by combining equimolar amounts of the corresponding lithium amide and potassium tert-butoxide. Subsequent reaction with oxirane, alkyl bromides, and pivaldehyde gave the expected coupling products in reasonable yields. Coupling with (CH3)2CHCH2CHO and (CH3)2CCHCHO afforded the bark
异戊二烯已在四氢呋喃中与过量的空间受阻的二烷基酰胺化钾金属化,这是通过等摩尔量的相应的氨基化锂和叔丁醇钾的混合制备的。随后与环氧乙烷,烷基溴化物和苯乙醛的反应以合理的收率得到了预期的偶联产物。与(CH 3)2 CHCH 2 CH = O和(CH 3)2 C =CHCH =O偶合,以低收率得到树皮甲虫信息素(±)-异酚和(±)-异戊二烯酚。