The monobromocarbenoid derived from CH2Br2 and NaN(SiMe3)2 gives only endo adducts 4, 5, and 6 with 1,5-cyclooctadiene, but shows no selectivity with 1,3-cyclooctadiene. A literature report of a high endo adduct preference of cyclooctene cannot be duplicated, but cyclodecene is converted to 3 with 100% selectivity. Bromocarbenoid adducts 11, 13, and 14 of norbornene and norbornadiene are reported.
衍生自CH 2 Br 2和NaN(SiMe 3)2的单
溴卡宾类化合物仅与
1,5-环辛二烯形成内加合物4、5和6,而与1,3-
环辛二烯则没有选择性。关于环
辛烯的高内加合物偏爱性的文献报道无法重复,但是环
癸烯以100%的选择性转化为3。据报道,
降冰片烯和降
冰片二烯的
溴类化合物加合物11、13和14。给出了不同选择性的可能解释。