Visible-Light-Mediated Aerobic Oxidation of Organoboron Compounds Using in Situ Generated Hydrogen Peroxide
作者:Wei-Zhi Weng、Hao Liang、Bo Zhang
DOI:10.1021/acs.orglett.8b02095
日期:2018.8.17
A simple and general visible-light-mediated oxidation of organoboroncompounds has been developed with rose bengal as the photocatalyst, substoichiometric Et3N as the electron donor, as well as air as the oxidant. This mild and metal-free protocol shows a broad substrate scope and provides a wide range of aliphatic alcohols and phenols in moderate to excellent yields. Notably, the robustness of this
SUBSTITUTED IMIDAZOLONE DERIVATIVES, PREPARATIONS AND USES
申请人:Bouey Edith
公开号:US20100004159A1
公开(公告)日:2010-01-07
The present invention relates to polysubstituted imidazolone derivatives, to the pharmaceutical compositions comprising them and to the therapeutic uses thereof in the human and animal health fields. The present invention also relates to a process for preparing these derivatives.
Hydroalumination of alkenes by the LiAlH4 � 3AlBr3 system
作者:E. V. Gorobets、O. V. Shitikova、S. I. Lomakina、G. A. Tolstikov、A. V. Kuchin
DOI:10.1007/bf00699198
日期:1993.9
3AlBr3 system in low-polar solvents was studied. Alkenes with mono-, di-, tri-, and tetraalkyl substituted, mono- and diaryl substituted doublebonds and anthracene react at room temperature to give the corresponding dibromoaluminoalkanes in high yields. Benzylidenefluorene, tetraphenylethylene, naphthalene, and phenanthrene do not undergo hydroalumination under these conditions. Camphene, bicyclo[3.2
A compound of the formula:
wherein R1 is H or a substituent; m is 1-3; Ar is an aromatic group which may be substituted; X is a bond or a divalent straight-chain group having 1-6 atoms which may be substituted; Y is —S—, —O—, or —N(R2— (R2 is H or a substituent group), Z is —N═ or —C(R3)═ (R3 is H or a hydrocarbon group), ring A is a benzene ring; ring B is a 5- to 7-membered ring which may be substituted, or a salt thereof is useful for eliciting a prostaglandin I2 receptor agonistic effect.
A catalytic asymmetric alkylation of azoles with secondary 1‐arylalkyl bromides through direct C−H functionalization is reported. Under blue‐light photoexcitation, a copper(I)/carbazole‐based bisoxazoline (CbzBox) catalytic system exhibits good reactivity and high stereoselectivity, thus offering an efficient strategy for the construction of chiral alkyl azoles. These reactions proceed at low temperature