New developments in heterocyclic silyl enol ether chemistry: synthesis and Lewis acid-mediated reactions with carbon electrophiles of 2,5-bis(trimethylsiloxy)thiopene and 1-methyl-2,5-bis(trimethylsiloxy)pyrrole
Photochemical addition of secondary alcohols to maleimides
作者:Muhammed A. S. Al-Amoudi、John M. Vernon
DOI:10.1039/a907517h
日期:——
Under UV irradiation, propan-2-ol adds to the CC bond of maleimides 4 to give 2-(1-hydroxy-1-methylethyl)succinimides 5 in 25–70% yield. Cyclohexanol adds in the same way to give 2-(1-hydroxycyclohexyl)succinimides 6. Several trace by-products are identified by GC-MS analysis and their formation accounted for.
SmI2-Promoted novel tandem elimination and coupling reactions of aliphatic imides with carbonyl compounds: application to the synthesis of dl-isoretronecanol
Treatment of α-hetero-substituted cyclic imides with carbonylcompounds mediated by samarium(II) diiodide in the presence of HMPA was found to undergo novel tandem elimination and reductive coupling reactions to generate α-hydroxyalkylated imides in good to high yields. Stereochemistry of the coupling products was researched and the result that increasing the steric bulkiness of the N-substituents