The organocatalyzed regioselective allylic trifluoromethylation of Morita–Baylis–Hillman adducts using Ruppert–Prakash reagent was achieved in high to excellent yields via a successive SN2′/SN2′ mode for the first time. The reaction was extended to the asymmetric allylic trifluoromethylation by the use of a bis-cinchona alkaloid catalyst with high enantioselectivities up to 94% ee.
首次通过连续的S N 2'/ S N 2'模式,使用Ruppert-Prakash试剂对Morita-Baylis-Hillman加合物进行了有机催化的区域选择性烯丙基三氟甲基化反应,收率很高。通过使用具有高达94%ee的高对映选择性的双金鸡纳生物碱催化剂,反应扩展到不对称的烯丙基三氟甲基化反应。
Synthesis of multi‐functionalized carbonyl compounds by palladium–catalysed γ‐substitution of MBH adducts with activated amides
Catalytic allylic γ‐substitution with Morita‐Baylis‐Hillman (MBH) adducts for creating a new family of unsymmetrical dicarbonyl compounds was presented in this work, in which a variety of allylated amide products were achieved in good yields and high regioselectivity with excellent linear‐to‐branched ratios. Especially, it was found that the Pd/HZNU‐Phos complex exhibited remarkably high activity (with
Simple and facile synthesis of tetralone-spiro-glutarimides and spiro-bisglutarimides from Baylis–Hillman acetates
作者:Deevi Basavaiah、Raju Jannapu Reddy
DOI:10.1039/b717843c
日期:——
A simple and convenient synthesis of di(E)-arylidene-tetralone-spiro-glutarimides fromBaylis-Hillmanacetates via an interesting biscyclization strategy involving facile C-C and C-N bond formation is described. Also, one-pot multistep transformation of the Baylis-Hillmanacetates into di(E)-arylidene-spiro-bisglutarimides is presented.
Catalyst- and Additive-Free Electrochemical CO2 Fixation into Morita–Baylis–Hillman Acetates
作者:Giulio Bertuzzi、Marco Bandini、Andrea Brunetti
DOI:10.1055/a-2029-0488
日期:——
The electrochemical carboxylation of Morita–Baylis–Hillman (MBH) acetates with CO2 is presented. The process proceeds in the absence of transition-metal catalysts and relies on the cathodic reduction of MBH acetates to generate nucleophilic anions that are able to trap low-pressure CO2. Valuable succinate derivatives are obtained (20 examples) in high yields (up to 90%) and with excellent functional
介绍了Morita–Baylis–Hillman (MBH) 乙酸盐与 CO 2的电化学羧化反应。该过程在没有过渡金属催化剂的情况下进行,并依赖于 MBH 乙酸盐的阴极还原以产生能够捕获低压 CO 2的亲核阴离子。以高产率(高达 90%)和优异的官能团耐受性获得了有价值的琥珀酸酯衍生物(20 个例子)。记录了转化的显着底物控制(电子性质)区域选择性以及基于控制实验的机械原理。
Asymmetric Synthesis of 2-Alkyl-3-phosphonopropanoic Acids via P−C Bond Formation and Hydrogenation
作者:Pallavi A. Badkar、Nigam P. Rath、Christopher D. Spilling
DOI:10.1021/ol701500s
日期:2007.8.1
Allylic acetates, formed by the acetylation of Baylis Hillman adducts, undergo addition of phosphorus nucleophiles to give stereoselectively the Z-unsaturated esters. TFA cleavage of the tert-butyl ester and asymmetric hydrogenation of the unsaturated acid yields the phosphono alkyl propanoic acid moiety, commonly found in phosphonate- and phosphinate-based enzyme inhibitors.