Construction of Functionalized Carbocycles Having Contiguous Tertiary Carbinol and All-Carbon Stereogenic Centers
作者:Chennakesava Reddy、Srinivasarao Arulananda Babu、Nayyar Ahmad Aslam、Vadla Rajkumar
DOI:10.1002/ejoc.201201382
日期:2013.4
A highly stereoselective protocol is reported for customizing functionalized carbocyclic building blocks (β-hydroxy esters) and bicyclic lactones with a stereoarray that contains contiguous tertiary carbinol and all-carbon stereocenters. The efficient asymmetric induction and diastereofacial selective addition of allyl and propargyl indiums to hindered α,α-disubstituted cycloalkanones is presented
报告了一种高度立体选择性的协议,用于定制功能化碳环结构单元(β-羟基酯)和双环内酯,其立体阵列包含连续的叔甲醇和全碳立体中心。介绍了烯丙基和炔丙基铟与受阻 α,α-二取代环烷酮的有效不对称诱导和非对映选择性加成。代表性产物的立体化学是从单晶 X 射线晶体结构分析中明确建立的,并提出了一种合理的反应途径来支持高非对映面选择性。
Silica Support-Enhanced Pd-Catalyzed Allylation Using Allylic Alcohols
allylation using allylicalcohol is an environmentally‐friendly method because of water being the sole byproduct in such reactions, allylicalcohol is one of the most difficult allylating agents in Pd‐catalyzed allylation of nucleophiles. In this study, we successfully developed a mesoporous silica‐supported Pd complex as an efficient catalyst for the allylation of nucleophiles using allylicalcohols as allylating
Mn(III)-Based Oxidative Free-Radical Cyclizations of Unsaturated Ketones
作者:Bridget McCarthy Cole、Luning Han、Barry B. Snider
DOI:10.1021/jo961199u
日期:1996.1.1
free-radical cyclization of unsaturated ketones is a versatile synthetic procedure with broad applicability. For example, oxidation of cyclopentanone 1a with 2 equiv of Mn(OAc)(3).2H(2)O and 1 equiv of Cu(OAc)(2).H(2)O in AcOH at 80 degrees C for 1.5 h affords 75% of bicyclo[3.2.1]oct-3-en-8-one 8a and 15% of bicyclo[3.2.1]oct-2-en-8-one 9a. Bridgedbicyclicketones that cannot enolize further are isolated
Synthesis with manganic salts; part IV: Free radical trost allylation
作者:P Breuilles、D Uguen
DOI:10.1016/s0040-4039(00)94554-4
日期:1990.1
SH2, allylations of various keto compounds with 2-substituted allylic sulfones or sulfides have been efficiently performed using a ternary oxidizing mixture -i.e. manganic acetate, cupric acetate and lead dioxide- in acetic acid.
SH 2,已使用三元氧化混合物(即乙酸锰,乙酸铜和二氧化铅)在乙酸中有效地进行了各种酮化合物与2-取代的烯丙基砜或硫化物的烯丙基化反应。
BREUILLES, P.;UGUEN, D., TETRAHEDRON LETT. , 31,(1990) N, C. 357-360