Metal-Free Enantioselective Oxidative Arylation of Alkenes: Hypervalent-Iodine-Promoted Oxidative C−C Bond Formation
作者:Mio Shimogaki、Morifumi Fujita、Takashi Sugimura
DOI:10.1002/anie.201609110
日期:2016.12.19
The enantioselective oxyarylation of (E)‐6‐aryl‐1‐silyloxylhex‐3‐ene was achieved using a lactate‐based chiral hypervalent iodine(III) reagent in the presence of boron trifluoride diethyl etherate. The silyl ether promotes the oxidative cyclization, and enhances the enantioselectivity. In addition, the corresponding aminoarylation was achieved.
The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550≦1.0.
[EN] 2-AMINOPYRIMIDINE COMPOUND AND PHARMACEUTICAL COMPOSITION THEREOF AND APPLICATION THEREOF<br/>[FR] COMPOSÉ DE 2-AMINOPYRIMIDINE ET COMPOSITION PHARMACEUTIQUE LE COMPRENANT ET APPLICATION ASSOCIÉE<br/>[ZH] 2-氨基嘧啶类化合物及其药物组合物和应用