Base-induced rearrangement of .gamma.-diketones. II. Demonstration of the occurrence of skeletal rearrangement and of the reversibility of the reactiion
Catalytic decarboxylative alkylation of β-keto acids with sulfonamides via the cleavage of carbon–nitrogen and carbon–carbon bonds
作者:Cui-Feng Yang、Jian-Yong Wang、Shi-Kai Tian
DOI:10.1039/c1cc12790j
日期:——
An efficient decarboxylative alkylation reaction of β-keto acids with N-benzylic or N-allylic sulfonamides has been developed, for the first time, through sequential cleavage of carbonânitrogen and carbonâcarbon bonds in the presence of 10 mol% of FeCl3.
Unprecedented alkylation of silicon enolates with alcohols via carbenium ion formations catalyzed by tin hydroxide-embedded montmorillonite
作者:Michael Andreas Tandiary、Masashi Asano、Taiki Hattori、Satoshi Takehira、Yoichi Masui、Makoto Onaka
DOI:10.1016/j.tetlet.2017.03.073
日期:2017.5
The solid acid, tin hydroxide-embedded montmorillonite, catalyzes the unprecedentedalkylation of various silicon enolates with primary, secondary and tertiary benzylic alcohols as well as secondary allylic alcohols. The acid catalysis of Sn-Mont was not only higher than that of the other ion-exchanged montmorillonites (M-Mont; M = H, Ti, Fe and Al), but also higher than that of the typical homogeneous
固体酸,氢氧化锡包埋的蒙脱石可催化各种烯醇硅与伯,仲和叔苄醇以及仲烯丙基醇的空前烷基化。Sn-Mont的酸催化作用不仅高于其他离子交换的蒙脱土(M-Mont; M = H,Ti,Fe和Al),而且高于典型的均相酸催化剂(如BF)3 ·OEt 2,TMSOTf和TfOH。
Ni-Catalyzed Reductive Coupling of Alkyl Acids with Unactivated <i>Tertiary</i> Alkyl and Glycosyl Halides
作者:Chenglong Zhao、Xiao Jia、Xuan Wang、Hegui Gong
DOI:10.1021/ja510653n
日期:2014.12.17
highlights Ni-catalyzed reductivecoupling of alkyl acids with alkyl halides, particularly sterically hindered unactivated tertiary alkyl bromides for the production of all carbon quaternary ketones. The reductive strategy is applicable to α-selective synthesis of saturated, fully oxygenated C-acyl glycosides through easy manipulations of the readily available sugar bromides and alkyl acids, avoiding otherwise
COMPOUNDS FOR THE TREATMENT OF CANCER AND INFLAMMATORY DISEASE
申请人:SHY Therapeutics LLC
公开号:US20170174699A1
公开(公告)日:2017-06-22
Provided herein are compounds that inhibit the phosphorylation of MAPK and thus are useful in compositions and methods for treating cancer and inflammatory disease.
One-Pot Hydroxy Group Activation/Carbon-Carbon Bond Forming Sequence Using a Brønsted Base/Brønsted Acid System
作者:Alice Devineau、Guillaume Pousse、Catherine Taillier、Jérôme Blanchet、Jacques Rouden、Vincent Dalla
DOI:10.1002/adsc.201000602
日期:2010.11.22
distinct feature of the trichloroacetimidate group allows use of weaker acid catalysts such as 1,1′-bi-2-naphthol (BINOL)-derived phosphoric acid, pointing out the possible development of an enantioselective variant. This unprecedented sequential one-potBrønsted base-Brønsted acid catalysis further expands the synthetic scope of the trichloroacetimidate group.