5-cis (6 c) stereochemistry at the individual rings have been prepared in high yield. Their eta(3)-allyl palladium complexes (8 a-g, 9 c and 10) have been used as catalytic precursors in allylic alkylation reactions with excellent enantioselectivities (up to 96 %) for the trans oxazoline derivatives, while Pd/6 c system was inactive. NMR studies on palladium eta(3)-1,3-diphenylallyl intermediates (11
高产率地制备了在各个环上具有4,5-反式(5 ag)或4,5-顺式(6 c)立体
化学的新对映体双(
恶唑啉)家族。他们的eta(3)-烯丙基
钯配合物(8 ag,9 c和10)已被用作烯丙基烷基化反应的催化前体,对
恶唑啉衍
生物具有出色的对映选择性(最高96%),而Pd / 6 c体系为不活跃。对
钯eta(3)-1,3-二苯基烯丙基中间体(11a,c和e)的NMR研究表明,溶液中存在syn / syn-和syn / anti-烯丙基异构体。这类似于包含衍生自
丙二酸的双(
恶唑啉)的Pd烯丙基络合物中eta(3)-eta(1)-eta(3)异构的第一个例子。