XY–ZH systems as potential 1,3-dipoles. Part 1. Background and scope
作者:Ronald Grigg、H. Q. Nimal Gunaratne、James Kemp
DOI:10.1039/p19840000041
日期:——
XY–ZH Systems are considered in general terms and divided into four classes according to the number of constituent atoms that possess lone-pair electrons. Those systems in which the central Y atom possesses a lone pair are shown to be capable of participating in formal 1,2-H shifts generating 1,3-dipolar species. The scope of the reaction, including its possible relevance to the biochemistry of pyridoxal
X Y–ZH系统被视为通用术语,根据拥有孤对电子的组成原子的数量分为四类。中心Y原子具有孤对的那些系统显示出能够参与形成1,2-H移位的正式1,2-H移位,从而产生1,3-偶极物种。讨论了反应的范围,包括其可能与吡ido醛酶生物化学的相关性,并通过速率数据证明了一系列苯基甘氨酸和丙氨酸甲酯的芳基亚胺环加成N-苯基马来酰亚胺的速率对结构的影响。
Straightforward and Highly Stereoselective Synthesis of 3,3,4-Trifluoropyrrolidines Involving 1,3-Dipolar Cycloaddition with 2,3,3-Trifluoroacrylate
lithium diisopropylamide, took place smoothly to give the corresponding 1,3-dipolar cycloadducts, fluorine-containing pyrrolidines, in good yields and with high diastereoselectivities (>95:<5). When the fluorinated acrylate bore a chiral auxiliary as a substituent, for instance (l)-(–)-menthyl ester, the 1,3-dipolarcycloaddition reaction was found to give the corresponding fluorinated pyrrolidine derivatives
Reaction of Δ3-pyrrolines with dimethyl acetylenedicarboxylate. A novel pyrrole forming rearrangement
作者:Ronald Grigg、H.Q.Nimal Gunaratne、James Kemp
DOI:10.1016/s0040-4039(01)91159-1
日期:1984.1
Reaction of arylidene imines of methyl phenylglycinate with 2 moles of dimethylacetylenedicarboxylate (ADE) leads, via an intermediate Δ3-pyrroline, to loss of the original methyl phenylglycinate moiety and formation of 2-aryl-3,4,5-tricarbo methoxypyrroles.