with a lipase produced the regio- and enantioconvergent transformation of racemic allyl alcohols (1 or 2) into optically active allyl esters. In this system, the vanadium compounds catalyzed the continuous racemization of the alcohols along with the transposition of the hydroxyl group, while the lipase effected the chemo- and enantioselective esterification to achieve the dynamickineticresolution.
Intramolecular Reactions of Alkynes with Furans and Electron Rich Arenes Catalyzed by PtCl<sub>2</sub>: The Role of Platinum Carbenes as Intermediates
作者:Belén Martín-Matute、Cristina Nevado、Diego J. Cárdenas、Antonio M. Echavarren
DOI:10.1021/ja029125p
日期:2003.5.1
On the basis of DFT calculations, a cyclopropyl platinacarbene complex was found as the key intermediate in the process. The cyclopropane and dihydrofuran rings of this intermediate open to form a carbonyl compound, which reacts with the platinum carbene to form an oxepin, which is in equilibrium with an arene oxide. When the reaction is carried out in the presence of water, dicarbonyl compounds are
Peculiar Sharpless kinetic resolution of 2-furylmethanol and its application to the synthesis of (+)-Asperlin
作者:Zhi-Cai Yang、Wei-Shan Zhou
DOI:10.1016/0040-4039(95)01170-m
日期:1995.7
A peculiar kineticresolution of E-1-(2-furyl)-2-buten-1-ol (1), which produced two oxidation products, pyranone (2) and epoxyalcohol (3), was developed by using the modified Sharplessreagents. A short synthesis of (+)-Asperlin was achieved starting from the opticallyactiveresolution products.