Studies of the tandem Mukaiyama aldol-lactonization (TMAL) reaction: A concise and highly diastereoselective route to β-lactones applied to the total synthesis of the potent pancreatic lipase inhibitor, (−)-Panclicin D
作者:Hong Woon Yang、Cunxiang Zhao、Daniel Romo
DOI:10.1016/s0040-4020(97)01029-6
日期:1997.12
A concise and highly diastereoselective route to β-lactones has been developed based on a tandemMukaiyamaaldol-lactonization employing thiopyridylsilylketene acetals and various aldehydes. (−)-Panclicin D, a potent pancreatic lipase inhibitor, was synthesized using this methodology. Recent optimization and extensions of this method are described which include variation of the silyl group and leaving
A Highly Diastereoselective, Tandem Mukaiyama Aldol-Lactonization Route to β-Lactones: Application to a Concise Synthesis of the Potent Pancreatic Lipase Inhibitor, (−)-Panclicin D
作者:Hong Woon Yang、Daniel Romo
DOI:10.1021/jo9619488
日期:1997.1.1
Pt-Catalyzed Rearrangement of Oxaspirohexanes to 3-Methylenetetrahydrofurans: Scope and Mechanism
作者:Christian A. Malapit、Sampada M. Chitale、Meena S. Thakur、Rosa Taboada、Amy R. Howell
DOI:10.1021/acs.joc.5b00604
日期:2015.5.15
A novel Pt-catalyzed rearrangement of oxaspirohexanes to 3-methylenetetrahydrofurans is reported. Mechanistic studies by 13C-labeling experiments confirm oxidative addition of Pt(II) regioselectively to the least substituted carbon–carbon bond of the cyclopropane to form a platinacyclobutane intermediate. To our knowledge, this is the first alkoxy-substituted platinacyclobutane that has been observed