Syntheses of 2-Benzylbenzofuran Derivatives and 2-Aryl-nitrochroman Derivatives from Nitroalkene Precursors
作者:Chia-Yu Huang、Chun-Wei Kuo、Veerababurao Kavala、Ching-Fa Yao
DOI:10.1002/ejoc.201600314
日期:2016.5
the synthesis of 2-benzylbenzofuran, 3-substituted 2-benzylbenzofuran, and 2-aryl-nitrochroman derivatives are described. Benzofurans were generated from nitroalkenes by reduction with NaBH4 followed by a Nef reaction and acid-mediated cyclization, whereas 3-substituted 2-benzylbenzofurans were prepared from nitroalkenes by reactions with Grignard reagents followed by a Nef reaction and an acid-mediated
Reduction of α,β-unsaturated nitroalkenes with borane and borohydrides. A convenient route to 3-nitro-, 3-hydroxylamino-, and 3-amino-2h-1-benzopyran derivatives
作者:Rajender S. Varma、Yuan-Zhu Gai、George W. Kabalka
DOI:10.1002/jhet.5570240343
日期:1987.5
The borohydride catalyzed boranereduction of 3-nitrochromenes provided a facile route to a variety of 3-hydroxylamino- 5 and 3-amino-2H-1-benzopyranes 6. Reduction with methoxyborohydride species, on the other hand, provided 3-nitrochromans 2,4.
硼氢化物催化的3-硝基苯并二氢硼烷还原为各种3-羟基羟氨基5和3-氨基-2 H -1-苯并吡喃提供了简便的途径。另一方面,用甲氧基硼氢化物还原可提供3-硝基苯并二氢吡喃2 ,4。