Preparation of Optically Active <i>cis</i>-Cyclopropane Carboxylates: Cyclopropanation of α-Silyl Stryenes with Aryldiazoacetates and Desilylation of the Resulting Silyl Cyclopropanes
作者:Yan Su、Qing-Fang Li、Yu-Ming Zhao、Peiming Gu
DOI:10.1021/acs.orglett.6b02117
日期:2016.9.2
Opticallyactive cis-cyclopropane carboxylates are prepared via the Rh2(S-PTAD)4-catalyzed cyclopropanation of α-silyl styrenes with aryl diazoacetates followed by desilylation of the resulting silyl cyclopropane carboxylates. The conjugation of the aryl ring with C═C bond and π stacking are proposed for the stereoselectivity of cyclopropanation, and configuration inversion is observed with the desilylation
Ni, Zhi-Jie; Yang, Pin-Fan; Ng, Dennis K. P., Journal of the American Chemical Society, 1990, vol. 112, # 25, p. 9356 - 9364
作者:Ni, Zhi-Jie、Yang, Pin-Fan、Ng, Dennis K. P.、Tzeng, Yih-Ling、Luh, Tien-Yau
DOI:——
日期:——
NI, ZHI-JIE;YANG, PIN-FAN;NG, DENNIS K. P.;TZENG, YIH-LING;LUH, TIEN-YAU, J. AMER. CHEM. SOC., 112,(1990) N5, C. 9356-9364
作者:NI, ZHI-JIE、YANG, PIN-FAN、NG, DENNIS K. P.、TZENG, YIH-LING、LUH, TIEN-YAU
DOI:——
日期:——
Pyrolysis of methylsilyl phenyl ketones. Formation of silene in the decomposition of an intermediate silaoxetane
作者:Wataru Ando、Akira Sekiguchi
DOI:10.1016/s0022-328x(00)92877-8
日期:1977.6
intramolecular insertion into the CH bond of a silyl-methyl group to give an unstable silaoxetane intermediate. The thermal decomposition of the silaoxetane proceeded by cleavage of both the silicon-carbon and the silicon-oxygen bonds. The scission of the SiC bond gave styrene and an SiO doublebonded intermediate which trimerized to a cyclotrisiloxane. On the other hand, the scission of the SiO bond yielded
Asymmetric hydrogenation of 1-silyl-1-substituted alkenes for preparation of optically active silanes
作者:Dan-Dan Ma、Peiming Gu、Rui Li
DOI:10.1016/j.tetlet.2016.11.017
日期:2016.12
Asymmetrichydrogenation of 1-silyl-1-substituted alkenes has been explored, producing eight optically active silanes with good to excellent enantioselectivity (66–99% ee) and yield (74–99%). The reaction was efficiently catalyzed by the cationic N,P-Ir complexes, and the polar solvents were found to be essential for the stereocontrol of the conversion.