Complete Facial Selectivity in the Diels–Alder Reaction of a 5-Amino-5-carboxycyclopentadiene Derivative
作者:Simon Kim、Marco A. Ciufolini
DOI:10.1021/ol201236j
日期:2011.6.17
5-tert-Butoxycarbonylamino-5-carbethoxy-2-tert-butyldimethylsilyloxy-cyclopentadiene undergoes a Diels–Alder reaction exclusively from the face syn to the nitrogen functionality. Complete reversal of facial bias may be achieved, but at the cost of diminished reactivity, through steric shielding of the N-syn face.
5-叔丁氧羰基氨基-5-乙氧基-2-叔丁基二甲基甲硅烷氧基-环戊二烯仅从表面合成到氮官能团经历狄尔斯-阿尔德反应。通过对N- syn脸部进行空间屏蔽,可以完全逆转面部偏见,但以降低反应性为代价。