important quaternary α-benzyl- and α-allyl-α-methylamino cyclobutanones in good to high yield, via a sequential one-pot methylation/sigmatropic rearrangement, has been accomplished for the first time. The quaternary α-alkyl-α-amino cyclobutanones could be further manipulated, affording synthetically interesting scaffolds such as highlysubstituted tryptamines and cyclobuta-fused indolines.
Catalytic Enantioselective Synthesis of α-(Benzylamino)cyclobutanones
作者:Nicola Melis、Lorenza Ghisu、Régis Guillot、Pierluigi Caboni、Francesco Secci、David J. Aitken、Angelo Frongia
DOI:10.1002/ejoc.201500460
日期:2015.7
An organocatalytic enantioselectivesynthesis of α-(benzylamino)cyclobutanones has been achieved by employing a tandem condensation/intramolecular rearrangement/proton transfer reaction and starting from racemic α-hydroxycyclobutanone and a selection of benzylamines. This reaction sequence afforded the products in good to high yields with moderate to high enantioselectivities.
Stereospecific synthesis of (1S,2S)-1-hydroxy-2-[(S)-valylamino]-cyclobutane-1-acetic acid, a novel microbial antimetabolite
作者:Robert M. Adlington、Jack E. Baldwin、Richard H. Jones、John A. Murphy、Melchiorre F. Parisi
DOI:10.1039/c39830001479
日期:——
The unusual cyclobutane-containing dipeptide (1S,2S)-1-hydroxy-2-[(S)-valylamino]-cyclobutane-1-aceticacid (1), produced by an as yet unidentified Streptomyces species X-1092 was synthesised via a short stereospecific route.
This invention relates to aryloxycycloalkanolaminoalkylene aryl ketones to the processes for their preparation and to their use as antihypertensive agents.
The synthesis and antimicrobial activity of (1,2)-1-hydroxy-2-[(s)-valylamino]cyclobutane-1-acetic acid (1) and (1, 2)-1-hydroxy-2-aminocyclobutane-1-acetic acid (2)
作者:Jack E. Baldwin、Robert M. Adlington、Melchiorre F. Parisi、Hong-Hoi Ting
DOI:10.1016/0040-4020(86)80025-4
日期:1986.1
The unusual cyclobutanol containingdipeptide (1,2)-1-Hydroxy-2-[(S)-valylamino]cyclobutane-1-acetic acid (1), produced by an as yet unidentified Streptomyces species X-1092, has been synthesised a short stereoselective route. Acid hydrolysis of (1) gave (1,2)-1-hydroxy-2-aminocyclobutane-1-acetic acid (2) which in direct comparison tests to (1) gave enhanced antibacterial activity against the gram-positive