Supramolecular Recognition Allows Remote, Site-Selective C−H Oxidation of Methylenic Sites in Linear Amines
作者:Giorgio Olivo、Giulio Farinelli、Alessia Barbieri、Osvaldo Lanzalunga、Stefano Di Stefano、Miquel Costas
DOI:10.1002/anie.201709280
日期:2017.12.18
Site‐selective C−H functionalization of aliphatic alkyl chains is a longstanding challenge in oxidation catalysis, given the comparable relative reactivity of the different methylenes. A supramolecular, bioinspired approach is described to address this challenge. A Mn complex able to catalyze C(sp3)‐H hydroxylation with H2O2 is equipped with 18‐benzocrown‐6 ether receptors that bind ammoniumsubstrates via hydrogen
考虑到不同亚甲基的相对反应性,脂族烷基链的位点选择性CH功能化在氧化催化中是一个长期的挑战。描述了一种超分子的,受生物启发的方法来应对这一挑战。能够催化H 2 O 2的C(sp 3)-H羟基化反应的Mn络合物配有18-苯并冠-6醚受体,可通过氢键结合铵底物。质子化脂肪族伯胺与冠醚的可逆预缔合选择性地将较远的位置(C8和C9)暴露于氧化单元,从而导致位点选择性氧化。值得注意的是,这种选择性控制可保持其对整个线性胺系列的效率,而不论链长如何,都可取代CH键的固有反应性。
Hydrophobic Effect and Substrate Specificity in Reaction of Thioester and Amine in Water
作者:Atsushi Torihata、Chiaki Kuroda
DOI:10.1246/bcsj.20100143
日期:2010.12.15
extent of hydrophobic effect in amidation reaction of alkyl thioester with alkylamine in water was studied. The yield of the products was primarily dependent on the alkyl group of amine. For example, the reaction of S-dodecyl dodecanethioate with dodecylamine proceeded in good yield, while the reaction did not occur with cyclohexylamine, piperidine, and dipropylamine. The effect of chain length of n-alkylamine
The present disclosure provides compounds having affinity for the M2 proton channel, useful for the treatment of viral infections such as influenza, which are of the Formula (I):
wherein R
1
, R
2
, and Y are as defined herein. Methods of preparing the compounds, pharmaceutical compositions containing the compounds, and methods of using the compounds in the treatment of viral infections such as influenza are also provided.
NOVEL 1,3-BENZOXAZOL-2(3H)-ONES AND THEIR USE AS MEDICAMENTS AND COSMETICS
申请人:DR. AUGUST WOLFF GMBH & CO. KG ARZNEIMITTEL
公开号:US20150111935A1
公开(公告)日:2015-04-23
The present invention relates to a novel class of 1,3-benzoxazol-2(3H)-ones and their use as a medicament, preferably as a dermatologic agent, and as a cosmetic. These novel compounds are particularly useful in treating and/or preventing inflammation, irritation, itching, pruritus, pain, oedema and/or pro-allergic or allergic conditions in a patient. Usually they are topically applied to the skin or mucosa in the form of a pharmaceutical or cosmetic composition comprising the compound and a pharmaceutically and/or cosmetically acceptable carrier.
A blue laser-ready information recording medium improved in light stability and durability without impairment of record/playback characteristics is provided.
The information recording medium is an optical information recordingmediumhaving on a substrate a recording layer that permits recording of information by irradiation with laser light of 440 nm or below, and is a heat-mode information recording medium that has a recording layer containing a methine dye and an organic oxidant on a transparent disk-form substrate on which a pregroove having a track pitch of 0.2 to 0.5 µm is formed, and that on the pregroove-formed side of the substrate.