Selective reduction of alkynes to cis-alkenes by hydrometallation using [(Ph3P)CuH]6.
作者:John F. Daeuble、Colleen McGettigan、Jeffrey M. Stryker
DOI:10.1016/s0040-4039(00)97371-4
日期:1990.1
Selective reduction of alkynes to the corresponding alkenes is reported using the stable, readily prepared copper(I) hydride reagent, [(Ph3P)CuH]6. Terminal alkynes are reduced at room temperature, unactivated internal alkynes react only at elevated temperature. Disubstituted alkynes with propargyl activation are also reduced, giving cis-olefins selectively. Protection of propargylic alcohol functionality
据报道,使用稳定,易于制备的氢化铜(I)氢化物[(Ph 3 P)CuH] 6可以将炔烃选择性还原为相应的烯烃。末端炔烃在室温下被还原,未活化的内部炔烃仅在升高的温度下反应。具有炔丙基活化的二取代炔烃也被还原,选择性地产生顺式烯烃。通常不需要保护炔丙醇的功能,尽管在空间受阻的情况下,有时碎片化是竞争性的。乙酸炔丙酯叔胺专门取代了丙二烯。