Chemoselective synthesis of polyfunctional aminophenyl 2-oxobut-3-enyl - and quinolinylmethyl- C-glycopyranosides from nitrophenyl 2-oxobut-3-enyl C-glycopyranosides under ultrasonic vibration
作者:K. Kumar G. Ramakrishna、Arya Ajay、Anindra Sharma、Rama P. Tripathi
DOI:10.3998/ark.5550190.0014.213
日期:——
Chemoselective reduction of nitro group in polyfunc tional nitrophenyl 2-oxobut-3-enyl C- glycopyranosides to the respective aminophenyl 2-ox obut-3-enyl glycopyranosides with SnCl 2.2H 2O under ultrasonic vibration in good yields was ach ieved successfully. Other potentially reducible groups such as carbonyl, este r, azide, tosyl, alkenic substituents were unaffected during reaction. The 2 '-nitr
在超声波振动下成功地实现了多功能硝基苯基 2-oxobut-3-enyl C-glycopyranosides 中硝基的化学选择性还原为相应的氨基苯基 2-ox obut-3-enyl glycopyranosides 和 SnCl 2.2H 2O。其他潜在的可还原基团,如羰基、酯、叠氮化物、甲苯磺酰基、烯基取代基在反应过程中不受影响。2'-硝基苯基-2-oxobut-3-enyl glycopyranosides 作为还原底物,通过还原和分子内环缩合反应得到 2-quinolinemethyl pyranosides。这些 β-C-吡喃糖苷在药物化学中具有广阔的前景。