Iodobenzene-catalyzed oxidative cleavage of olefins to carbonyl compounds
作者:Lele Du、Zechao Wang、Junliang Wu
DOI:10.1016/j.tetlet.2020.152204
日期:2020.8
A metal-free approach for the oxidativecleavage of carbon–carbon double bonds of olefins to carbonyl compounds was established by using oxidant m-CPBA and non-metallic organocatalyst PhI in toluene/H2O. A broad scope of aromatic olefins was used. All the reactions proceeded smoothly at 35 °C in short reaction time to furnish the respective mono- and double carbonyl compounds selectively in moderate
通过使用氧化剂m -CPBA和甲苯/ H 2 O中的非金属有机催化剂PhI,建立了一种无金属的方法将烯烃的碳-碳双键氧化裂解为羰基化合物。使用了广泛的芳族烯烃。所有反应均在35°C的短时间内顺利进行,以中等至良好的收率选择性提供各自的单羰基化合物和双羰基化合物。
Synthesis of unsaturated esters from aldehydes: An inexpensive, practical alternative to the Horner-Emmons reaction under neutral conditions
作者:Brian E. Ledford、Erick M. Carreira
DOI:10.1016/s0040-4039(97)10182-4
日期:1997.11
A practical, efficient, and mild process is described for the synthesis of unsaturatedesters from aldehydes in good yields and diastereoselectivities. All of the reagents used in the protocol are commercially available at a nominal price: N2CHCO2Et, catalytic (1 mol%) ReOCl3(PPh3)2, and (EtO)3P. Additionally, the reaction process can be carried out successfully in good yields (85%) and diastereoselectivities
A catalytic amount of In(OAc) 3 smoothly promoted 1,4-reduction of certain α-enones with PhSiH 3 in ethanol at ambient temperature. The intermediary enolates could be used for inter- and intramolecular aldol reactions andintramolecular Michael addition.
Oxidations of alkenes with hypervalent iodine reagents: an alternative ozonolysis of phenyl substituted alkenes and allylic oxidation of unsubstituted cyclic alkenes
作者:Ufuk Atmaca、Hande K. Usanmaz、Murat Çelik
DOI:10.1016/j.tetlet.2014.02.076
日期:2014.4
bonds with a phenyl substituent can be cleaved with iodylbenzene and iodosylbenzene to give carbonyl compounds. It is believed that the reactions occur via a radical pathway. The allylic oxidation of cyclicalkenes lacking a phenyl substituent was achieved in acetonitrile/water mixture (3:1) also using iodylbenzene and iodosylbenzene.