Synthesis of stereochemically defined (E)-cinnamyl alcohol derivatives from the Baylis–Hillman adducts
作者:Hyoung Shik Kim、Tae Yi Kim、Ka Young Lee、Yun Mi Chung、Hong Jung Lee、Jae Nyoung Kim
DOI:10.1016/s0040-4039(00)00229-x
日期:2000.4
The reaction of the Baylis–Hillman adducts 1a–g and trifluoroacetic acid at 30–70°C gave the rearranged cinnamyl alcohols 2a–g stereoselectively in moderate yields.
Applications of the Baylis-Hillman Adducts in Organic Synthesis: A Facile Synthesis of [<i>E</i>]-α-Cyanocinnamyl Alcohols and [<i>E</i>]-α-Cyanocinnamic Aldehydes
Aqueous sulfuric acid mediated transformation of the Baylis-Hillman adducts, i.e. 3-aryl-3-hydroxy-2-methylenepropanenitriles, into [E]-α-cyanocinnamyl alcohols and subsequent oxidation with PCC leading to the formation of stereochemically pure [E]-α-cyanocinnamic aldehydes, which represents an efficient alternative route to the Knoevenagel condensation reaction, is described.
A Simple Route to 3-Substituted 2-Cyano Allylic Alcohols
作者:Mouna Aiai、Michèle Baudy-Floc’h、Albert Robert、Philippe Le Grel
DOI:10.1055/s-1996-4214
日期:1996.3
The first original and simple route to 3-substituted 2-cyano allylic alcohols with very good yields is described. The epoxide function in the key step acts as a protecting group during the synthesis of these allylic alcohols.
Electrochemical, Regioselective, and Stereoselective Synthesis of Allylic Thioethers and Selenoethers under Transition-Metal-Free and Oxidant-Free Conditions
coupling protocol between allylic iodides and disulfides/diselenides for the formation of C–S/Se bonds in the absence of transition metals, bases, and oxidants. The stereochemically different densely functionalized allylic iodides gave regio- and stereoselective diverse thioethers in good yields. This strategy demonstrates a sustainable promising approach for the synthesis of allylic thioethers in 38–80%
First sharpless epoxidation of electrophilic 2-cyanoallylic alcohols
作者:Mouna Aiai、Albert Robert、Michèle Baudy-Floc'h、Philippe Le Grel
DOI:10.1016/0957-4166(95)00300-e
日期:1995.9
For the first time we describe the synthesis of asymmetric cyano epoxy alcohols in good yield and high enantiomeric excess via a Sharpless epoxidation of electrophilic 2-cyanoallylic alcohols.