6302-93-8Relevant articles and documents
Dithioacetalization or thioetherification of benzyl alcohols using 9-mesityl-10-methylacridinium perchlorate photocatalyst
Pramanik, Milan,Choudhuri, Khokan,Mathuri, Ashis,Mal, Prasenjit
supporting information, p. 10211 - 10214 (2020/09/21)
We report herein the use of 9-mesityl-10-methylacridinium perchlorate as the visible-light photocatalyst for dithioacetalization or thioetherification of benzyl alcohols in one pot using aerial dioxygen as a terminal oxidant. EPR analysis and Stern-Volmer
Enantioselective synthesis of natural dibenzylbutyrolactone lignans (-)-enterolactone, (-)-hinokinin, (-)-pluviatolide, (-)-enterodiol, and furofuran lignan (-)-eudesmin via tandem conjugate addition to γ-alkoxybutenolides1,2
Van Oeveren,Jansen,Feringa
, p. 5999 - 6007 (2007/10/02)
A general and efficient method is described for the asymmetric synthesis of a variety of liguans. 5-(Menthyloxy)-2(5H)-furanones 5 proved to be excellent chiral synthons in this respect and could be transformed with complete stereoselectivity into a number of lignans. The addition of lithiated dithianes 7 to enantiomerically pure butenolides 5 was followed by quenching of the resulting lactone enolate anions with a benzylbromide (9) or with an aldehyde (6). This tandem addition quenching procedure gave the diastereomerically pure adducts 11, 26, or 27 in 50-67% yield, with a carbon skeleton as found in most natural lignans. As examples of the wide applicability of this method, the syntheses of the enantiomerically pure natural lignans (-)-hinokinin (23b), (-)-enterolactone (24a), (-)-pluviatolide (24c), and (-)-enterodiol (25) in overall yields of 29-37% from 5a and (-)eudesmin (30) in 16% overall yield from 5b are described.
PREPARATION OF N-ALKADIENYL N-E-2-ARYLETHENYLCARBAMATES VIA SULFOXIDE ELIMINATION IN A SYNTHETIC APPROACH TO LYCORINE
Jung, Michael E.,Miller, Steven J.
, p. 839 - 853 (2007/10/02)
N-E-2-Arylethenylcarbamates have been prepared in good yields from N-carbamates via sulfoxide elimination towards nitrogen.