Cyclocondensation of (±)-<i>exo</i>,<i>exo</i>-5,6-(Isopropylidenedioxy)-3-(pyrrolidinomethylene)bicyclo[2.2.1]heptan-2-one with N-C-N Dinucleophiles
作者:Olga Caamaño、Isabel Pérez-Castro、Marcos García、Franco Fernández、Carmen López
DOI:10.1055/s-2007-965997
日期:2007.5
prepared by condensation of amidines with (±)- EXO, EXO-5,6-(isopropylidenedioxy)-3-(pyrrolidinomethylene)bicyclo[2.2.1]heptan-2-one. Deprotection of the 2-phenyl derivative was followed by its one-pot transformation into a 1:1 mixture of (±)- CIS- and (±)- TRANS-2-phenyl-6,7-dihydro-5 H-cyclopenta[ D]pyrimidine-5,7-dimethanol by oxidative glycol cleavage and subsequent reduction with sodium borohydride
通过脒与(±)-EXO、EXO-5,6-(异亚丙基二氧基)缩合制备了许多受保护的2-取代的5,6,7,8-四氢-5,8-甲基喹唑啉-6,7-二醇-3-(吡咯烷亚甲基)双环[2.2.1]庚烷-2-酮。将 2-苯基衍生物脱保护后,将其一锅转化为 (±)- CIS- 和 (±)- TRANS-2-phenyl-6,7-dihydro-5 H-cyclopenta [ D]嘧啶-5,7-二甲醇通过氧化乙二醇裂解并随后用硼氢化钠还原。