Vapour-phase gold-surface-mediated coupling of aldehydes with methanol
作者:Bingjun Xu、Xiaoying Liu、Jan Haubrich、Cynthia M. Friend
DOI:10.1038/nchem.467
日期:2010.1
temperature with high selectivity. The high selectivity is attributed to the ease of nucleophilic attack of the aldehydes by the methoxy intermediate—formed frommethanol on the surface—which yields the methyl esters. The competing combustion occurs via attack of both methanol and the aldehydes by oxygen. The mechanistic model constructed in this study provides insight into factors that control selectivity
Mechanism of Methyl Esterification of Carboxylic Acids by Trimethylsilyldiazomethane
作者:Erik Kühnel、David D. P. Laffan、Guy C. Lloyd-Jones、Teresa Martínez del Campo、Ian R. Shepperson、Jennifer L. Slaughter
DOI:10.1002/anie.200702131
日期:2007.9.17
Structural study of methyl and tert-butyl phenylacetate enolates in solution: spectroscopic determination of their E or Z configuration
作者:Jacques Corset、Francoise Froment、Marie France Lautie、Nicole Ratovelomanana、Jacqueline Seyden-Penne、Tekla Strzalko、Marie Claude Roux-Schmitt
DOI:10.1021/ja00058a012
日期:1993.3
examined by IR and 13 C NMR spectroscopy in different solvents and solvent mixtures. In the IR, coupling of aromatic ring mode with the v(C . - . O) stretching vibration allows assignment of the E (or Z) configuration to the corresponding enolate. The IR mode assignments are secured by specific deuteration of the phenyl or methyl moieties in methyl phenylacetate.
Li和K的甲基和叔丁基苯基乙酸酯烯醇化A,M和B,M的结构已经通过IR和13 C NMR光谱在不同溶剂和溶剂混合物中进行了检测。在 IR 中,芳环模式与 v(C . - . O) 伸缩振动的耦合允许将 E(或 Z)构型分配给相应的烯醇化物。IR 模式分配通过苯乙酸甲酯中苯基或甲基部分的特定氘化来保证。