The simultaneous in-situ generation of aldehydes and phosphorus ylides. A convenient multi-step one-pot olefination protocol
1999
Abstract
Li a-(dimethylamino)alkoxides resulting from the nucleophilic addn. of an organolithium reagent to DMF are basic enough to deprotonate alkyltriphenylphosphonium salts suspended in THF. The aldehydes, liberated by the spontaneous decompn. of the resulting a-amino alcs. (hemi-aminals), undergo a Wittig reaction with the simultaneously generated P ylides to afford olefins in excellent overall yields. This in situ method offers the unique advantage in its applicability to labile aldehydes which otherwise would become prey to (Z/E)-isomerization or self-condensation processes. [on SciFinder (R)]
Details
Title
The simultaneous in-situ generation of aldehydes and phosphorus ylides. A convenient multi-step one-pot olefination protocol
Author(s)
Wang, Qian ; Wei, Heng-Xu ; Schlosser, Manfred
Published in
European Journal of Organic Chemistry
Issue
12
Pages
3263-3268
Date
1999
Keywords
Wittig reaction (Wittig olefination with simultaneous in-situ generation of aldehydes and phosphorus ylides); Aldehydes Role: RCT (Reactant); SPN (Synthetic preparation); PREP (Preparation); RACT (Reactant or reagent) (Wittig olefination with simultaneo; organolithium DMF alkylphosphonium Wittig olefination; alkene prepn; aldehyde in situ generation Wittig; phosphorus ylide in situ generation Wittig
Note
CAN 132:22577 21-2 General Organic Chemistry Institut Chimie Organique,Univ. Lausanne,Lausanne,Switz. Journal 1434-193X written in English. 68-12-2 (DMF); 110-83-8 (Cyclohexene); 401-78-5 (3-Bromobenzotrifluoride); 588-72-7 (E-b-Bromostyrene); 590-13-6 (Z-1-Bromopropene); 591-50-4 (Iodobenzene); 1014-60-4 (1,3-Di-tert-butylbenzene); 1449-46-3 (Benzyltriphenylphosphonium bromide); 1530-33-2 (Isopropyltriphenylphosphonium bromide); 1779-51-7 (Butyltriphenylphosphonium bromide); 4762-26-9 (Hexyltriphenylphosphonium bromide); 5293-84-5 ((Chloromethyl)triphenylphosphonium chloride); 6228-47-3 (Propyltriphenylphosphonium bromide); 21406-61-1 (Pentyltriphenylphosphonium bromide); 35761-83-2 (Z-3-Iodo-2-buten-1-ol); 37428-50-5 (Z-3-Iodo-2-propen-1-ol); 57918-63-5 (Z-b-Iodostyrene); 62285-98-7; 96385-23-8 Role: RCT (Reactant), RACT (Reactant or reagent) (Wittig olefination with simultaneous in-situ generation of aldehydes and phosphorus ylides); 6130-97-8P; 119125-30-3P; 148802-00-0P; 151502-81-7P Role: RCT (Reactant), SPN (Synthetic preparation), PREP (Preparation), RACT (Reactant or reagent) (Wittig olefination with simultaneous in-situ generation of aldehydes and phosphorus ylides); 351-78-0P (b-Fluorostyrene); 2198-23-4P (4-Nonene); 3740-05-4P; 4911-56-2P (5,5-Dimethyl-1,3-hexadiyne); 19789-42-5P (3,5-Di-tert-butylstyrene); 28495-61-6P; 31915-94-3P; 39491-72-0P; 39491-73-1P; 92260-77-0P; 118304-54-4P; 119946-52-0P; 132313-14-5P; 251987-55-0P; 251987-59-4P Role: SPN (Synthetic preparation), PREP (Preparation) (Wittig olefination with simultaneous in-situ generation of aldehydes and phosphorus ylides)
Laboratories
LSCO
Record Appears in
Scientific production and competences > SB - School of Basic Sciences > SB Archives > LSCO - Laboratory of Organic Synthesis and Catalysis
Peer-reviewed publications
Work produced at EPFL
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Published
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date
2006-03-03