Parallel Microflow Photochemistry: Process Optimization, Scale-up, and Library Synthesis
摘要:
A novel, multimicrocapillary flow reactor (M mu CFR) was constructed and applied to a series of sensitized photoadditions involving 2(5H)-furanones. The reactor allowed for rapid and energy-, time-, and space-efficient sensitizer screening, process optimization, validation, scale-up, and library synthesis.
Highly diastereoselective addition of photochemically generated radicals to (5R)-(−)-menthyloxy-2[5H]-furanone - synthesis of(−)-terebic acid
作者:Norbert Hoffmann
DOI:10.1016/s0957-4166(00)86239-4
日期:1994.5
Photochemically generated ketyl and 2-dioxdanyl radicals are added with high diastereoselectivity (de > 95%) to (5R)-(-)-5-menthyloxy-2[5H]furanone. This reaction is used for the asymmetric synthesis of (-)-terebic acid. The double bond is attacked by the radicals on the ul-side.
Stereoselective intermolecular addition of ketyl radicals generated from ketones by photoinduced electron transfer
作者:Cédric Brulé、Norbert Hoffmann
DOI:10.1016/s0040-4039(01)02089-5
日期:2002.1
Ketyl radicals were produced from ketones by photochemical electron transfer and subsequent proton transfer from tertiary amines. These radicals were stereoselectively added to (5R)-5-(-)-menthyloxy-2[5H]-furanone 1. Due to their low reactivity, the alpha -aminoalkyl radicals which were generated at the same time were not added to 1. The ketones were used in stoichiometric quantities. (C) 2001 Elsevier Science Ltd. All rights reserved.
Parallel Microflow Photochemistry: Process Optimization, Scale-up, and Library Synthesis
A novel, multimicrocapillary flow reactor (M mu CFR) was constructed and applied to a series of sensitized photoadditions involving 2(5H)-furanones. The reactor allowed for rapid and energy-, time-, and space-efficient sensitizer screening, process optimization, validation, scale-up, and library synthesis.