Asymmetric Allylic Alkylation of Acyclic Allylic Ethers with Organolithium Reagents
作者:Manuel Pérez、Martín Fañanás-Mastral、Valentín Hornillos、Alena Rudolph、Pieter H. Bos、Syuzanna R. Harutyunyan、Ben L. Feringa
DOI:10.1002/chem.201202251
日期:2012.9.17
CuI/phosphoramidite‐catalyzed asymmetric allylic alkylation of allyl ethers with organolithiumreagents is reported (see scheme). The use of organolithiumreagents is essential for this catalytic CC bond formation due to their compatibility with different Lewis acids. The versatility of allylic ethers under the copper‐catalyzed reaction conditions with organolithiumreagents is demonstrated in the shortest
报道了用有机锂试剂对烯丙基醚进行的高效,区域和对映选择性的Cu I /亚磷酰胺催化的不对称烯丙基烷基化反应(参见方案)。由于与不同的路易斯酸具有相容性,因此使用有机锂试剂对于这种催化的CC键形成至关重要。(S)-戊二酸的最短合成证明了烯丙基醚在铜催化的条件下与有机锂试剂的多功能性。
Le Bigot, Y.; Delmas, M.; Gaset, A., Synthetic Communications, 1982, vol. 12, # 2, p. 107 - 112
作者:Le Bigot, Y.、Delmas, M.、Gaset, A.
DOI:——
日期:——
KATRITZKY, A. R.;EL-MOWAFY, AZZAHRA, M., J. ORG. CHEM., 1982, 47, N 18, 3506-3511
作者:KATRITZKY, A. R.、EL-MOWAFY, AZZAHRA, M.
DOI:——
日期:——
LE, BIGOT YVES;DELMAS, MICHEL;GASET, ANTOINE, TETRAHEDRON, 44,(1988) N 4, 1057-1072
作者:LE, BIGOT YVES、DELMAS, MICHEL、GASET, ANTOINE
DOI:——
日期:——
Osmium(III) and Osmium(V) Complexes Bearing a Macrocyclic Ligand: A Simple and Efficient Catalytic System for<i>cis</i>-Dihydroxylation of Alkenes with Hydrogen Peroxide
作者:Hideki Sugimoto、Kenji Ashikari、Shinobu Itoh
DOI:10.1002/asia.201300329
日期:2013.9
efficient cis‐1,2‐dihydroxylation of alkenes is presented. Unfunctionalized (or aliphatic) alkenes and alkenes/styrenes containing electron‐withdrawing groups are selectively oxidized to the corresponding vicinal diols in good to excellent yields (46–99 %). In the catalytic reactions, the stoichiometry of alkene:H2O2 is 1:1, and thus the oxidant efficiency is very high. For the dihydroxylation of cyclohexene
一个简单的协议,它使用[Os III(OH)(H 2 O)(L -N 4 Me 2)](PF 6)2(1 ; L- N 4 Me 2 = N,N'-二甲基-2,11 ‐diaza [3.3](2,6)pyridinophane)作为催化剂,H 2 O 2作为有效顺式的末端氧化剂介绍了烯烃的1,2-二羟基化反应。含有吸电子基团的未官能化(或脂肪族)烯烃和烯烃/苯乙烯被选择性氧化成相应的邻位二醇,收率良好至极佳(46–99%)。在催化反应中,烯烃:H 2 O 2的化学计量为1:1,因此氧化效率非常高。对于环己烯的二羟基化,可以将1的催化量降低至0.01 mol%,以实现5500的极高周转率。活性氧化剂被鉴定为Os V(O)(OH)种类(2)。通过氢过氧化物加合物形成的Os III(OOH)物种。活性氧化剂2 已成功分离并进行了晶体学表征。