Reactions d'addition sur les composes carbonyles, allylation, arylation, vinylation et acylation en presence ou non de catalyseurs
反应 d'addition sur les 组成羰基、烯丙基化、芳基化、乙烯基化和酰化在非脱催化剂的存在下
Trichlorotitanium and alkoxytitanium homoenolates. Preparation, characterization, and utilization for organic synthesis
作者:Eiichi. Nakamura、Hiroji. Oshino、Isao. Kuwajima
DOI:10.1021/ja00273a032
日期:1986.6
demi-equivalent d'alcoolate de titane (IV) sont plus reactives que I, fournissant des voies d'acces a des hydroxy-4 esters, γ-lactones et cyclopropanecarboxylates. Discussion du mecanisme de formation des homoenolates
Des eseses alcoxytitaniumgenerees par traitement de trichlorotitanio-3propionates d'alkyles (I) avec un demi-equivalent d'alcoolate de titane (IV) sont plus reactors que I, Fournissant des voies d'acces a des hydroxy-4esters, γ-内酯和环丙烷羧酸盐。同烯醇化物形成机制的讨论
Synthesis of (1S,2S)- and (1R,2R)-1-amino-2-methylcyclopropane-phosphonic acids from racemic methylcyclopropanone acetal
作者:Nicolas Tesson、Benoist Dorigneux、Antoine Fadel
DOI:10.1016/s0957-4166(02)00609-2
日期:2002.10
An efficient and easy one-pot reaction from readily available racemic alkylcyclopropanone acetals gave the corresponding aminophosphonates with excellent diastereoselectivity. After catalytic hydrogenolysis, and hydrolysis, these trans-phosphonates led to enantiopure (+)-1-amino-2-methylcyclopropanephosphonic acid and its antipode (analogues of allo-norcoronamic acid).
Synthesis of 1,4-dicarbonyl compounds and 4-keto pimelates by palladium-catalyzed carbonylation of siloxycyclopropanes
作者:Satoshi Aoki、Eiichi Nakamura
DOI:10.1016/s0040-4020(01)86434-6
日期:1991.1
Palladium-catalyzed reaction of a siloxycyclopropane with an aryl triflate under carbon monoxide pressure (10-20 atm) in HMPA and that with carbon monoxide in chloroform provides new synthetic routes to 1,4-dicarbonyl compounds and 4-keto pimelates, respectively. The reaction of a siloxycyclopropane with a vinyl triflate, on the other hand, gives an acyloxycyclopropane instead.
Copper-catalyzed acylation and conjugate addition of zinc homoenolate. Synthesis of 4- and 5-oxo esters