Preparation and structure of an unusual dimeric furan from the acid decomposition of isomaltol
作者:James C. Goodwin、John E. Hodge、David Weisleder
DOI:10.1016/0008-6215(86)85028-5
日期:1986.1
enolic nonenzymic browning-product, decomposes in dilute acid to form the new red-orange colored, symmetrical dimer, ( E )-2-[1-(3-hydroxy-2-furanyl)ethylidene]-(2 H )-furan-3-one ( 2 ). Compound 2 was obtained in 20.4% yield with toluenesulfonic acid (⩾3 m ) at 50°. The structure for 2 was assigned on the basis of spectral data (m.s., u.v., i.r., 13 C- and 1 H-n.m.r.) and conversion into its mono- O -acetyl
摘要烯醇式非酶褐变产物异麦芽酚(1)在稀酸中分解形成新的红橙色对称二聚体(E)-2- [1-(3-羟基-2-呋喃基)亚乙基]- (2 H)-呋喃-3-酮(2)。在50°下用甲苯磺酸(⩾3 m)以20.4%的收率获得化合物2。2的结构是根据光谱数据(ms,uv,ir,13 C-和1 Hn.mr)分配的,并转换为其单-O-乙酰基衍生物(3)。