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Rhodium-catalyzed linear cross-trimerization of two different alkynes with an alkene and two different alkenes with an alkyne

机译:铑催化的两种不同炔烃与烯烃的线性催化二聚反应

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摘要

Crossing paths with rhodium: A cationic Rh ~I/H _8-BINAP complex has been found to catalyze the linear cross-trimerization of terminal alkynes, acetylenedicarboxylates, and acrylamides to give substituted trienes. The asymmetric linear cross-trimerization, giving substituted chiral dienes, has also been achieved by using monosubstituted alkenes and (R)-BINAP instead of terminal alkynes and H _8-BINAP (see scheme; H _8-BINAP=2,2'- bis(diphenylphosphino)-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl; BINAP=2,2'-bis(diphenylphosphino)-1,1'-binaphthyl]).
机译:与铑的交叉路径:已发现阳离子Rh〜I / H _8-BINAP络合物催化末端炔烃,乙炔二羧酸酯和丙烯酰胺的线性交叉三聚反应,生成取代的三烯。还可以通过使用单取代的烯烃和(R)-BINAP代替末端炔烃和H _8-BINAP(参见方案; H _8-BINAP = 2,2'- bis)实现不对称线性交叉三聚,得到取代的手性二烯。 (二苯基膦基)-5,5',6,6',7,7',8,8'-八氢-1,1'-联萘基; BINAP = 2,2'-双(二苯基膦基)-1,1'-联萘]]。

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