One-Pot Conversion of Carbohydrates into Pyrrole-2-carbaldehydes as Sustainable Platform Chemicals
作者:Nirmal Das Adhikary、Sunjeong Kwon、Wook-Jin Chung、Sangho Koo
DOI:10.1021/acs.joc.5b01349
日期:2015.8.7
carbohydrates and amino esters in heated DMSO with oxalic acid expeditiously produced the pyrrole-2-carbaldehyde skeleton, which can be concisely transformed into the pyrrole alkaloid natural products, 2-benzyl- and 2-methylpyrrolo[1,4]oxazin-3-ones 8 and 9, lobechine 10, and (−)-hanishin 11 in 23–32% overall yields from each carbohydrate.
通过在90°C下与伯胺和草酸在DMSO中反应,开发了一种将碳水化合物转化为N-取代的5-(羟甲基)吡咯-2-甲醛(吡咯啉)的实用方法。高度官能化的吡咯啉的进一步环化提供了吡咯稠合的多杂环化合物,作为药物,食品风味剂和功能材料的潜在中间体。草酸在加热的二甲基亚砜中,碳水化合物和氨基酯的温和美拉德变体迅速产生了吡咯-2-甲醛基骨架,可以简明地转化为吡咯生物碱天然产物2-苄基和2-甲基吡咯烷[1,4] oxazin -3-ones 8和9,lobechine 10和(-)-hanishin 11 每种碳水化合物的总产量为23–32%。