Palladium(0)-catalysed allylation of uracils and thiouracils. Influence of the solvent on the regioselectivity of the allylation
作者:Catherine Goux、Silvana Sigismondi、Denis Sinou、Montserrat Pérez、Marcial Moreno-Mañas、Roser Pleixats、Mercè Villarroya
DOI:10.1016/0040-4020(96)00486-3
日期:1996.7
Uracil and 5-substituted uracils are monoallylated at N-1 in H2O-CH3CN with the catalytic (or tppts) although performing the reaction in H2O/THF with the system leads to diallylations at N-1 + N-3. 2-Thiouracil, 5-methyl-2-thiouracil (2-thiothymine) and 6-methyl-2-thiouracil are monoallylated at sulfur in with the catalytic system (or tppts). Performing the reactions in H2O/THF with the system leads
尿嘧啶和5-取代的尿嘧啶在H 2 O-CH 3 CN中的N-1处被催化(或tppts)单芳基化,尽管在H 2 O / THF中与该体系进行反应会导致N-1 + N-处的二烯丙基化3。2-硫氧嘧啶,5-甲基-2-硫氧嘧啶(2-硫胸腺嘧啶)和6-甲基-2-硫氧嘧啶在硫磺中通过催化体系(或tppts)被单芳基化。在系统中于H 2 O / THF中进行反应会导致2-硫尿嘧啶和2-硫胸腺嘧啶在N-1 + N-3处进行烯丙基化,而6-甲基-2-硫尿嘧啶则在S + N-3处进行二烯丙基化。