Identification and optimisation of 3,3-dimethyl-azetidin-2-ones as potent and selective inhibitors of 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1)
作者:William McCoull、Martin Augustin、Caroline Blake、Anne Ertan、Elaine Kilgour、Stephan Krapp、Jane E. Moore、Nicholas J. Newcombe、Martin J. Packer、Amanda Rees、John Revill、James S. Scott、Nidhal Selmi、Stefan Gerhardt、Derek J. Ogg、Stefan Steinbacher、Paul R. O. Whittamore
DOI:10.1039/c3md00234a
日期:——
3,3-Di-methyl-azetidin-2-ones were identified as potent and selective 11β-HSD1 inhibitors against the human and mouse forms of the enzyme. Structure guided optimisation of LLE was conducted, utilising a key polar interaction and identifying stereochemical preference for the 4S isomer. Metabolic stability was improved to afford oral exposure, providing tool compounds suitable for pre-clinical evaluation
Cobalt-catalyzed arylation of aldimines via directed C–H bond functionalization: addition of 2-arylpyridines and self-coupling of aromatic aldimines
作者:Ke Gao、Naohiko Yoshikai
DOI:10.1039/c2cc31114c
日期:——
A cobaltâN-heterocyclic carbene catalyst, in combination with an appropriate Grignard reagent, promotes a chelation-assisted aromatic CâH functionalization reaction via addition to an aromatic aldimine.
Montmorillonite K10 catalyzed Mannich-type reaction and hydrophosphonylation proceeded smoothly in water at room temperature to give β-amino esters and α-amino phosphonates, respectively, in good to high yields.
Cobalt-catalyzed ortho-alkenylation of aromatic aldimines via chelation-assisted C–H bond activation
作者:Takeshi Yamakawa、Naohiko Yoshikai
DOI:10.1016/j.tet.2013.02.092
日期:2013.6
An ortho-alkenylation reaction of an aromatic aldimine with an internal alkyne is efficiently promoted by a cobalt catalyst generated from CoBr2, triarylphosphine, and iPrMgBr. The reaction takes place under mild room-temperature conditions to afford, upon acidic hydrolysis, a variety of ortho-alkenylated aromatic aldehydes in moderate to excellent yields. The neighboring formyl and alkenyl groups
Enantioselective Generation of Adjacent Stereocenters in a Copper‐Catalyzed Three‐Component Coupling of Imines, Allenes, and Diboranes
作者:Kay Yeung、Rebecca E. Ruscoe、James Rae、Alexander P. Pulis、David J. Procter
DOI:10.1002/anie.201606710
日期:2016.9.19
enantio‐ and diastereoselective copper‐catalyzed three‐component coupling affords the first general synthesis of homoallylicamines bearing adjacent stereocenters from achiral starting materials. The method utilizes a commercially available NHC ligand and copper source, operates at ambient temperature, couples readily available simple imines, allenes, and diboranes, and yields high‐value homoallylic amines