Regioselectivity of nucleophilic substitution of the nitro group in 2,4,6-trinitrobenzamide
作者:Tatyana K Shkinyova、Igor L Dalinger、Sergei I Molotov、Svyatoslav A Shevelev
DOI:10.1016/s0040-4039(00)00750-4
日期:2000.6
Under the action of anionic nucleophiles RO− (R=Ph, HCF2CF2CH2), R′S− (R′=Ph, PhCH2, C2H5OC(O)CH2), N3− on 2,4,6-trinitrobenzamide in MeCN or DMF, the ortho-nitro group is substituted with high selectivity. Intramolecular cyclisation involving ortho-positioned fragments SX and -CONH2 (XC2H5OC(O)CH2, Cl) has been achieved with the formation of 2-ethoxycarbonyl-3-hydroxy-4,6-dinitrobenzo[b]thiophene
下的作用的阴离子亲核试剂RO -(R = PH,HCF 2 CF 2 CH 2),R'S -(R'=苯基,物理信道2,C 2 H ^ 5 OC(O)CH 2),N 3 -上在MeCN或DMF中的2,4,6-三硝基苯甲酰胺中,邻硝基被高选择性取代。分子内环化涉及邻定位的片段SX和-CONH 2(XC 2 ħ 5 OC(O)CH 2,Cl)的已用2-乙氧羰基-3-羟基-4,6- dinitrobenzo的形成来实现[ b噻吩和4,6-二硝基-2 H-苯并[ b ]异噻唑-3-一。