Michael addition reactions of α β-ene-3′-phenylselenone of uridine. New synthesis of 2′,3′-dideoxy-ribo-aziridino-, 2′,3′-dideoxy-2′, 3′-ribo-cyclopropyl- & 2,2′-O-anhydro-3′-deoxy-3′-amino uridine derivatives
作者:J.-C. Wu、J. Chattopadhyaya
DOI:10.1016/s0040-4020(01)89086-4
日期:——
high-yielding synthesis of 1- [5′-O-(4-monomethoxytrityl)-2′,3′-dideoxy-3′-phenylselenonyl-β-D-glyceropent-2′-enofuranosyl]uracil (6) is described starting from 5′-O-(4-monomethoxytrityl)-2′,3′-O-anhydro-β-D-lyxofuranosyl uracil 1. The α, β-ene-3′-phenylselenone 6 can be easily deprotected to give 7. The synthetic utilities of 6 and 7 as synthetic equivalent of a dication [ CH2+ - CH2+ ] have been demonstrated
描述了1- [5'- O-(4-单甲氧基三苯甲基)-2',3'-二脱氧-3'-苯基硒代壬基-β-D-甘油基-2'-烯呋喃糖基]尿嘧啶的高产率合成(6)从5′- O-(4-单甲氧基三苯甲基)-2′,3′- O-脱水-β-D-呋喃呋喃糖基尿嘧啶1开始。α,β-烯-3'-苯基硒烯酮6可以很容易地脱保护得到7。6和7的合成效用作为指示符[CH 2 + -CH 2 +的合成等价物从以下事实证明]:它们充当迈克尔受体并在C-2'与氨,甲胺,苄胺和甘氨酸甲酯发生共轭加成反应,然后在C-3'进行分子内直接S N 2型置换反应在加合物中,得到各种2',3'- dideoxy-ribo-aziridino尿苷8a-d或13a-c,而二甲胺,吡咯烷和吗啉得到2,2'- O -anhydro-3'-deoxy-3 '-取代的氨基尿苷10a – c。碳亲核试剂,如丙二酸甲酯钠和与6反应生成的硝基甲烷和苯乙酮的共轭碱