用浓溶液处理2-(1-羟烷基)丙-2-烯酸甲酯1。用HBr溶液得到(Z)-2-(溴甲基)烷-2-烯酸甲酯2,将其区域选择性地转化成N-取代的甲基(E)-2-(氨甲基)烷-2-烯酸酯3(S N 2反应)并进入ñ取代的甲基2-(1-氨基烷基)丙-2- enoates 4(S ñ 2'反应)。胺对亲核性攻击的区域控制仅通过选择溶剂即可完成,S N 2反应发生在MeCN和S N中。在石油醚中进行2'反应。水解和内酰胺化分别得到β-内酰胺7和8,分别在C(3)处含有外环亚烷基和亚甲基。
用浓溶液处理2-(1-羟烷基)丙-2-烯酸甲酯1。用HBr溶液得到(Z)-2-(溴甲基)烷-2-烯酸甲酯2,将其区域选择性地转化成N-取代的甲基(E)-2-(氨甲基)烷-2-烯酸酯3(S N 2反应)并进入ñ取代的甲基2-(1-氨基烷基)丙-2- enoates 4(S ñ 2'反应)。胺对亲核性攻击的区域控制仅通过选择溶剂即可完成,S N 2反应发生在MeCN和S N中。在石油醚中进行2'反应。水解和内酰胺化分别得到β-内酰胺7和8,分别在C(3)处含有外环亚烷基和亚甲基。
Accelerated Amination of Baylis–Hillman Acetates Under Ultrasound Irradiation
作者:Shao-Qin Ge、Yun-Yu Hua、Min Xia
DOI:10.1080/00397910903219310
日期:2010.6.16
The amination of the Baylis-Hillman acetates with primary amines can be dramatically promoted with improved yields and shortened reaction time under ultrasound irradiation. The selected aromatic, heteroaromatic, and aliphatic amines were investigated as the effective candidates for the sonochemical transformation.
?-Methylidene- and ?-Alkylidene-?-lactams from Nonproteinogenic Amino Acids
作者:Rainer Buchholz、H. Martin R. Hoffmann
DOI:10.1002/hlca.19910740608
日期:1991.9.18
Treatment of methyl 2-(1-hydroxyalkyl)prop-2-enoates 1 with conc. HBr solution afforded methyl (Z)-2-(bromomethyl)alk-2-enoates 2, which were transformed regioselectively into N-substituted methyl (E)-2- (aminomethyl)alk-2-enoates 3 (SN2 reaction) and into N-substituted methyl 2-(1-aminoalkyl)prop-2-enoates 4(SN2′ reaction). Regiocontrol of nucleophilic attack by amine was accomplished simply by choice
用浓溶液处理2-(1-羟烷基)丙-2-烯酸甲酯1。用HBr溶液得到(Z)-2-(溴甲基)烷-2-烯酸甲酯2,将其区域选择性地转化成N-取代的甲基(E)-2-(氨甲基)烷-2-烯酸酯3(S N 2反应)并进入ñ取代的甲基2-(1-氨基烷基)丙-2- enoates 4(S ñ 2'反应)。胺对亲核性攻击的区域控制仅通过选择溶剂即可完成,S N 2反应发生在MeCN和S N中。在石油醚中进行2'反应。水解和内酰胺化分别得到β-内酰胺7和8,分别在C(3)处含有外环亚烷基和亚甲基。