Synthesis of 5- and 6-Acyl-1-cyano and -1-ethoxycarbonyl Cycloalkenes
摘要:
Conjugated addition of primary nitroalkanes to the functional acetates 3 and 4 in basic medium, leads to the cyclic nitroesters 5 and nitronitriles 6. These derivatives are easily converted via the Nef reaction to the corresponding gamma-ketoestesrs 7 and gamma-ketonitriles 8 in good yields.
Substitution nucleophile d'acetates de cyclenols allyliques fonctionnels par des organometalliques en presence de sels cuivreux. Application a une synthese rapide de la (±)mitsugashiw alactone
作者:Hassen Amri、Monique Rambaud、Jean Villieras
DOI:10.1016/s0040-4020(01)81522-2
日期:1990.1
Substitution of functional allylic cycloalkenol acetates by Grignardreagents (primary , secondary, tertiary-alkyl, vinyl, aryl) in the presence of a catalytic amount (2.5% equivalent) of cuprous iodide at low temperature, gives high yields of various functional α-substituted cycloalkenes . The reaction can be applied to lithium enolates of esters and need no catalyst, but may be performed with HMPA
Short Synthesis of Functionalized Cyclic Homoallylsilanes
作者:Rim Ouled Saad、Taoufik Turki、Hassen Amri
DOI:10.1080/00397910500297370
日期:2005.11
The synthesis of functionalized cyclic homoallylsilanes 5 and 6 was described starting from functional cycloalkenols 1 and 2, in which the addition of silylcuprate to the functional acetates 3 and 4 were used as the key reaction step.
Elegant Synthesis of Highly Functionalized 1,2,3-Trisubstituted Cyclopentanes
作者:Fatma Saâdi、Aïcha Arfaoui、Hassen Amri
DOI:10.1080/00397911.2011.654371
日期:2013.6.3
The conversion of cyclic Baylis-Hillman acetates 1 into the corresponding cyano derivatives 2 was achieved using potassium cyanide in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) in aqueous medium. The obtained Michael acceptors 2 easily add primary amines in absolute ethanol to produce a new family of 1,2,3-trisubstituted cyclpentanes 3 in good yields.