N-Heterocyclic Carbene Catalyzed Dynamic Kinetic Resolution of Pyranones
作者:Changgui Zhao、Fangyi Li、Jian Wang
DOI:10.1002/anie.201508205
日期:2016.1.26
The dynamickineticresolution of 6‐hydroxypyranones with enals or alkynals through an asymmetric redox esterification is catalyzed by a chiral N‐heterocyclic carbene. The resulting esters are obtained in good to high yields and with high levels of enantio‐ and diastereocontrol. The reaction products are further derivatized to obtain functionalized sugar derivatives and natural products.
Synthesis of 1-functionalyzed 3-(diethoxyphosphorylmethyl)-4,5,6,7-tetrahydrobenzo[c]furans
作者:L. M. Pevzner
DOI:10.1134/s1070363209110176
日期:2009.11
diethylaminomethyl derivative, carboxylic acid, its ester, chloride, amide, and nitrile was synthesized. For the first time in the furan series decarboxylation of PO-ester of phosphonocarboxylic acid was carried out. Some specific features of behavior of the derivatives of 4,5,6,7-tetrahydrobenzo[c]furan in the reactions with thionylchloride, phosphorus pentachloride, ammonia, and N-bromosuccinimide
一系列3-(二乙氧基磷酰基)-4,5,6,7-四氢苯并[ c ^官能在包括未被取代的膦酸酯,二乙基氨基甲基衍生物,羧酸,它的酯,酰氯,酰胺位置1]呋喃,和腈的合成。在呋喃系列中,膦酰基羧酸的PO-酯第一次进行脱羧。发现了4,5,6,7-四氢苯并[ c ]呋喃的衍生物在与亚硫酰氯,五氯化磷,氨和N-溴代琥珀酰亚胺反应中的某些特定行为特征,这是普通烷基呋喃所不寻常的。