A retro-Diels-Alder approach to oxazoles and imidazoles
摘要:
Heating N-acyl derivatives 4 of 3-endo-aminobicyclo[2.2.1]hept-5-en-2-endo-ol (3) at 185-195-degrees-C for 4-5 h provides oxazoles 1a-e in 49-88 % yields. The reaction proceeds via initial dehydration to an oxazoline which undergoes retro-Diels-Alder reaction to provide the oxazole. Similarly, imidazoles 7a-f may be obtained in 40-79 % yields by heating imidazolines 6a-f to effect the cycloreversion.
DOI:
10.1021/jo00064a029
作为产物:
描述:
2,3-diamino-endo,cis-norbornon-5-ene 以0%的产率得到
参考文献:
名称:
Eissenstat Michael A., Weaver John D. (III), J. Org. Chem., 58 (1993) N 12, S 3387-3390
Eissenstat Michael A., Weaver John D. (III), J. Org. Chem., 58 (1993) N 12, S 3387-3390
作者:Eissenstat Michael A., Weaver John D. (III)
DOI:——
日期:——
A retro-Diels-Alder approach to oxazoles and imidazoles
作者:Michael A. Eissenstat、John D. Weaver
DOI:10.1021/jo00064a029
日期:1993.6
Heating N-acyl derivatives 4 of 3-endo-aminobicyclo[2.2.1]hept-5-en-2-endo-ol (3) at 185-195-degrees-C for 4-5 h provides oxazoles 1a-e in 49-88 % yields. The reaction proceeds via initial dehydration to an oxazoline which undergoes retro-Diels-Alder reaction to provide the oxazole. Similarly, imidazoles 7a-f may be obtained in 40-79 % yields by heating imidazolines 6a-f to effect the cycloreversion.