本文提出了在温和条件下利用N-卤代琥珀酰亚胺和二苯基膦氧化物合成通用手性和非手性( E )-α-卤代烯酰胺的简便立体选择性结构。该反应无金属、温和、高效、快速且实用,凸显了炔酰胺合成的多功能性。反应底物范围广;手性和非手性炔酰胺均已在很短的时间内转化为相应的 ( E )-α-卤代烯酰胺,而不会影响选择性或复杂性。
Highly regio- and stereocontrolled synthesis of β-substituted α-tributylstannyl enamides
作者:David Buissonneaud、Jean-Christophe Cintrat
DOI:10.1016/j.tetlet.2006.02.141
日期:2006.5
The regio- and stereocontrolledsynthesis of β-substituted α-stannyl enamides is reported starting from internal ynamides. The synthesis of new ynamides as well as bis-ynamides is also described. Finally first examples of successful cross-coupling to afford α/β-disubstituted enamides are also reported.
Regio- and stereoselective carbometallation reactions of <i>N</i>-alkynylamides and sulfonamides
作者:Yury Minko、Morgane Pasco、Helena Chechik、Ilan Marek
DOI:10.3762/bjoc.9.57
日期:——
The carbocupration reactions of heterosubstituted alkynes allow the regio- and stereoselective formation of vinyl organometallic species. N-Alkynylamides (ynamides) are particularly useful substrates for the highly regioselective carbocupration reaction, as they lead to the stereodefined formation of vinylcopper species geminated to the amide moiety. The latter species are involved in numerous synthetically useful transformations leading to valuable building blocks in organic synthesis. Here we describe in full the results of our studies related to the carbometallation reactions of N-alkynylamides.
Enantioselective allylic alkylation of stereodefined polysubstituted copper enolates as an entry to acyclic quaternary carbon stereocentres
作者:Zackaria Nairoukh、Gunda G. K. S. Narayana Kumar、Yury Minko、Ilan Marek
DOI:10.1039/c6sc03036j
日期:——
sequence of regio- and stereoselective carbometalation followed by oxidation of ynamides leads to stereodefined fully substituted enolates that subsequently react with various functionalized allyl bromidereagents to provide the expected products possessing an enantiomerically pure quaternary carbon stereocentre in the α-position to the carbonyl group in excellent yields and enantiomeric ratios after cleavage
Preparation of Multisubstituted Enamides via Rhodium-Catalyzed Carbozincation and Hydrozincation of Ynamides
作者:Benoit Gourdet、Mairi E. Rudkin、Ciorsdaidh A. Watts、Hon Wai Lam
DOI:10.1021/jo901658v
日期:2009.10.16
Rhodium-catalyzed carbozincation of ynamides using diorganozinc reagents or functionalized organozinc halides is described. Using a tri(2-furyl)phosphine-modified rhodium catalyst, the reaction course is altered to hydrozincation when diethylzinc is employed as the organozinc reagent. Trapping of the alkenylzinc intermediates produced in these reactions in further functionalization reactions is possible. Collectively, these processes enable access to a range of multisubstituted enamides in stereo- and regiocontrolled fashion.
Gourdet, Benoit; Lam, Hon Wai, Journal of the American Chemical Society, 2009, vol. 131, p. 3802 - 3803