A Maillard Approach to 2-Formylpyrroles: Synthesis of Magnolamide, Lobechine and Funebral
作者:Tsz-Ying Yuen、Samantha E. Eaton、Tom M. Woods、Daniel P. Furkert、Ka Wai Choi、Margaret A. Brimble
DOI:10.1002/ejoc.201301639
日期:2014.3
A convenient synthesis of the traditional medicine constituents magnolamide, lobechine and funebral is described. Construction of the 2-formylpyrrole core of these natural products was achieved by means of a Maillard reaction, involving condensation of the sugar surrogate, dihydropyranone 9, with the requisite primary amines. This approach offers a very direct and general route to the 2-formylpyrrole
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.