作者:Latchezar S. Trifonov、Alexander S. Orahovats
DOI:10.1002/hlca.19870700130
日期:1987.2.4
Allenic acids are found to add to dicyclohexylcarbodiimide affording, in the presence of Et2NH, the 4H-1,3-oxazin-4-ones 5via4. Under neutral conditions, they add to diaryl- or pyridyl(cyclohexyl)carbodiimides and triphenylketene imine to give the corresponding tricyclo[5.2.2.01,5]undeca-4,8,10-trien-3-ones 7, 8, 9, and 12. The allenic phenyl ester 13a dimerises, on heating in a [2+2] head-to-head
丙二烯羧酸被发现添加二环己基碳化得到,在Et的存在2 NH,4- ħ -1,3-恶嗪-4-酮5经由4。在中性条件下,它们增加了二芳基-或吡啶基(环己基)碳二亚胺和亚胺triphenylketene,得到相应的三环[5.2.2.0 1,5 ]十一碳-4,8,10三烯-3-酮7,8,9,和12。烯丙基苯基酯13a以[2 + 2]头对头方式加热时二聚为14,但未经历分子内Diels - Alder环化为15。