Aziridination of 2- and 3-phenyl-substituted allylic alcohols with 3-acetoxyaminoquinazolinones: probing the nature of the transition state from the diastereoselectivity of aziridination
作者:Robert S. Atkinson、Sabri Ulukanli、Paul J. Williams
DOI:10.1039/a902577d
日期:——
Aziridination of phenyl-substituted allylic alcohol 10 with 3-acetoxyaminoquinazolinone 3 (Q1NHOAc) and with 22 (Q2NHOAc) has been studied. The diastereoselectivity of these reactions is markedly changed by carrying them out in the presence of aqueous sodiumhydrogencarbonate solution and under these conditions aziridinations of 10 and of its ester analogue 5 with Q2NHOAc give the same magnitude and
已经研究了苯基取代的烯丙醇10与3-乙酰氧基氨基喹唑啉酮3(Q 1 NHOAc)和22(Q 2 NHOAc)的氮化。通过在碳酸氢钠水溶液中进行这些反应,可以显着改变这些反应的非对映选择性,并且在这些条件下,将10及其酯类似物5与Q 2 NHOAc进行叠氮化可以得到相同的幅度和非对映选择性(用Ph CO 2我)。非对映选择性的这些变化的解释是基于在存在和不存在乙酸的情况下,在用于10叠氮化的过渡态中氢键性质的差异。
Kinetic resolution of racemic allyl acetates in asymmetric allylic alkylation catalysed by a chiral ferrocenylphosphine–palladium complex
作者:Tamio Hayashi、Akihiro Yamamoto、Yoshihiko Ito
DOI:10.1039/c39860001090
日期:——
A chiralferrocenylphosphine–palladium catalyst effects a highly selective kineticresolution (kS/kR= 14) of racemicallylacetates such as 1-[(E)-styryl]-2-methylpropyl acetate in asymmetricallylicalkylation.
手性二茂铁基膦-钯催化剂可在不对称烯丙基烷基化反应中,使乙酸外消旋烯丙酯如1-[(E)-苯乙烯基] -2-甲基丙基乙酸酯具有高选择性的动力学拆分度(k S / k R = 14)。
Anti-Kishi selective dihydroxylation of allylic alcohol derivatives
作者:Oili A. Kallatsa、Ari M.P. Koskinen
DOI:10.1016/s0040-4039(97)10350-1
日期:1997.12
A highly diastereoselective dihydroxylation protocol has been developed for acyclic allylicalcohol derivatives leading to triol derivatives with diastereoselectivity reversed to the classical osmylation (anti-Kishi). Selectivities are acceptable for E-allylic derivatives 1, and high for those derived from Z-derivatives 4.
Aziridination of electron-rich acyclic allylic alcohols using 3-acetoxyaminoquinazolinones
作者:Robert S. Atkinson、John Fawcett、David R. Russell、Paul J. Williams
DOI:10.1016/0040-4039(95)00453-j
日期:1995.5
The products from aziridination of the phenyl-substituted allylic alcohols 6 and 7 with 3-acetoxyaminoquinazolinones 1 and 15 have been compared with those from aziridination of the methyl ester analogues 2, and 3: the differences in diastereoselectivities using these electron-rich and electron-deficient alkenes are ascribed to the intervention of transition states 8 and 4 respectively.
Cross-Coupling of Aryl Halides and Allyl Acetates with Arylboron Reagents in Water Using an Amphiphilic Resin-Supported Palladium Catalyst