Synthesis of [3.4]‐Spirooxindoles through Cascade Carbopalladation of Skipped Dienes
作者:Hamid Azizollahi、Marta Pérez‐Gómez、Vaibhav P. Mehta、José‐Antonio García‐López
DOI:10.1002/adsc.202000111
日期:2020.4.27
route to [3.4]‐spirooxindoles based on cascade carbopalladation reactions of 1,4‐dienes is described. While carbopalladation of alkenes have been used to access mainly [4.4]‐ or [4.5]‐spirocycles, 4‐exo‐trig carbopalladation has not been yet applied to the synthesis of relevant [3.4]‐spirooxindole scaffolds bearing a cyclobutyl ring. In addition, the cascade reaction generates an exocyclic double bond
[EN] A METHOD OF MAKING A POLYMER PREFERABLY AN (ALKYL)ACRYLOYL POLYCARBONATE, THE POLYMER AND (ALKYL)ACRYLOYL POLYCARBONATE OBTAINED, AND A BIODEVICE COMPRISING SAME<br/>[FR] PROCÉDÉ DE FABRICATION D'UN POLYMÈRE DE PRÉFÉRENCE D'UN POLYCARBONATE D'(ALKYL)ACRYLOYLE, POLYMÈRE ET POLYCARBONATE D'(ALKYL)ACRYLOYLE OBTENUS ET BIODISPOSITIF LES COMPRENANT
申请人:SSENS B V
公开号:WO2011009478A1
公开(公告)日:2011-01-27
The invention relates to a method for making a polymer wherein during the polymerisation is incorporated in the polymer chain by ring opening polymerisation a cyclic (alkyl)acryloyl carbonate having the formula (4): wherein R1 and R2 each independently are hydrogen, methyl or ethyl. Preferrable the polymer is an (alkyl)acryloyl polycarbonate such that at least one first monomer a cyclic (alkyl)acryloyl carbonate having the formula (4). The (alkyl)acryloyl polyester may be modified and used in biodevices.
Isoquinoline and quinoline have been discovered as novel ligands for palladium-catalyzedoxidative cascade cyclization reactions. With our new catalyst systems (Pd(OAc)2/isoquinoline or quinoline), unsaturated anilides cyclize under an oxygenatmosphere (1 atm) to furnish structurally versatile indoline derivatives in good yields. One C−N bond and two C−C bonds are formed in a single step with excellent
Catalyticasymmetric protonation of chiral calcium enolates was performed. Chiral calcium enolates, prepared in situ from imides and malonates via 1,4-addition in the presence of catalytic amounts of Ca(OEt)(2), Ph-PyBox, and achiral phenol, were smoothly protonated to afford adducts bearing tertiary asymmetric carbons in high yields with high enantioselectivities. The adducts were readily converted
Effect of Transition Metals on Chemodivergent Cross-Coupling of Acrylamides with Vinyl Acetate via C–H Activation
作者:Ravichandran Logeswaran、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.1c01797
日期:2021.8.6
A novel chemodivergent cross-coupling of acrylamides and vinyl acetates has been realized via metal-catalyzed vinylicC–Hactivation. The selective olefinic C–Hvinylation and alkenylation reaction was examined with a variety of differently functionalized acrylamides. The reaction efficiently generates a range of highly synthetically valuable butadienes with good functional group tolerance in good