用相应的方法制备1-羟基-1-甲基-6,6-二苯基-5-己烯基(4a)和1-羟基-1-甲基-7,7-二苯基-6-庚烯基(4b) PTOC酯(羧酸和N-羟基吡啶-2-硫酮)。用于前体的合成方法中的关键步骤是各个羧酸与硫代异羟肟酸的偶联反应,反应进行了约10分钟。5分钟,然后快速色谱纯化。速率常数的基团环化图4a和图4b中乙腈通过激光闪光光解法直接在–30至60°C之间测量了四氢呋喃和四氢呋喃中的四价铬。阿雷尼乌斯(Arrhenius)在乙腈对于4a和4b,分别为log k = 9.9–2.6 / 2.303 RT和log k = 8.9–4.4 / 2.303 RT(kcal mol -1)。在室温下9×10 7 s -1和4×10 5 s -1的环化速率常数比类似烷基的环化速率常数大。室温下H原子俘获4a的粗速率常数苯硫酚和4b由叔丁基硫醇分别为k T= 1.2×10 9 M -1 s -1和k
One-pot synthesis of diarylalkylcarbinols and substituted derivatives through carbon monoxide insertion reactions into aryllithiums
作者:Arturo A. Vitale、F. Doctorovich、N. Sbarbati Nudelman
DOI:10.1016/0022-328x(87)85117-3
日期:1987.9
atmospheric pressure and −78°C, affords diarylalkylcarbinols in good yields. Alkyl chlorides do not react under similar experimental conditions. This feature makes the reaction particularly useful for the synthesis of alcohols functionalized in the alkyl chain through subsequent reactions of the diaryl(chloro)alkylcarbinols. The procedure can also be adapted to afford substituted cyclic ethers. If the reaction
Concise Synthesis of Chiral N-Benzyl-α,α-Diarylprolinols through Shi Asymmetric Epoxidation
作者:Chengsheng Ge、Jie Li、Hai Zhou、Jiangsen Weng、Mingwen Wang、Wujie Tu
DOI:10.1055/s-0033-1340825
日期:——
A concise and practical synthesis of chiral N-benzyl-alpha,alpha-diaryl-2-prolinols was developed through Shi asymmetric epoxidation, followed by double nucleophilic substitution of bromo-containing olefins. A series of enantioenriched N-benzyl-alpha,alpha-diaryl-2-prolinols were obtained with excellent enantioselectivities (96% ee) in moderate to good yields (40-76% yield). For the first time, enantiopure N-benzyl-alpha,alpha-diphenyl-2-prolinol was obtained from bromo-containing olefin using this methodology.
ARYL-SUBSTITUTED PYRIDYLALKANE, ALKENE, AND ALKINE CARBOXAMIDES USEFUL AS CYTOSTATIC AND IMMUNOSUPPRESSIVE AGENTS
申请人:Klinge Pharma GmbH
公开号:EP1042291B1
公开(公告)日:2005-07-13
VITALE, ARTURO A.;DOCTOROVICH, F.;SBARBATI, NUDELMAN N., J. ORGANOMET. CHEM., 332,(1987) N 1-2, 9-18
作者:VITALE, ARTURO A.、DOCTOROVICH, F.、SBARBATI, NUDELMAN N.