Competitive [4 + 2] cycloadditions in equimolar mixtures of 1-arylphosphole oxides
作者:György Keglevich、Tungalag Chuluunbaatar、Beáta Dajka、Bat-Amgalan Namkhainyambuu、Krisztina Ludányi、László Tőke
DOI:10.1002/hc.1096
日期:——
Four different [4 + 2] cycloadditions were observed to take place in the equimolar mixtures of two different arylphosphole oxides 2a + 2b or 2b + 2c. In addition to the phosphole oxide dimers 3a-a and 3b-b, or 3b-b and 3c-c, the crossed cycloadducts 3a-b and 3b-a, or 3b-c and 3c-b were also formed in considerable portions. © 2001 John Wiley & Sons, Inc. Heteroatom Chem 12:633–635, 2001
观察到四种不同的 [4 + 2] 环加成发生在两种不同的芳基磷氧化物 2a + 2b 或 2b + 2c 的等摩尔混合物中。除了磷氧化物二聚体 3a-a 和 3b-b,或 3b-b 和 3c-c,交叉环加合物 3a-b 和 3b-a,或 3b-c 和 3c-b 也在相当多的部分形成。© 2001 John Wiley & Sons, Inc. 杂原子化学 12:633–635, 2001