作者:Douglas C. Behenna、Justin T. Mohr、Nathaniel H. Sherden、Smaranda C. Marinescu、Andrew M. Harned、Kousuke Tani、Masaki Seto、Sandy Ma、Zoltán Novák、Michael R. Krout、Ryan M. McFadden、Jennifer L. Roizen、John A. Enquist、David E. White、Samantha R. Levine、Krastina V. Petrova、Akihiko Iwashita、Scott C. Virgil、Brian M. Stoltz
DOI:10.1002/chem.201003383
日期:2011.12.9
functions with nearly identical efficiency in terms of yield and enantioselectivity. Catalyst discovery and development, the optimization of reaction conditions, the exploration of reactionscope, and applications in target‐directed synthesis are reported. Experimental observations suggest that these alkylationreactions occur through an unusual inner‐sphere mechanism involving binding of the prochiral
Development of (Trimethylsilyl)ethyl Ester Protected Enolates and Applications in Palladium-Catalyzed Enantioselective Allylic Alkylation: Intermolecular Cross-Coupling of Functionalized Electrophiles
作者:Corey M. Reeves、Douglas C. Behenna、Brian M. Stoltz
DOI:10.1021/ol500355z
日期:2014.5.2
compounds in palladium-catalyzedasymmetricallylicalkylation is explored, yielding a variety of α-quaternary six- and seven-membered ketones and lactams. Independent coupling partner synthesis engenders enhanced allyl substrate scope relative to traditional β-ketoester substrates; highly functionalized α-quaternary ketones generated by the union of (trimethylsilyl)ethyl β-ketoesters and sensitive
Enantioselective, catalytic allylation of ketones and olefins
申请人:Behenna C. Douglas
公开号:US20060084820A1
公开(公告)日:2006-04-20
Compounds containing a substituted or unsubstituted allyl group directly bound to a chiral carbon atom are prepared enantioselectively. Starting reactants are either chiral or achiral, and may or may not contain an attached allyloxycarbonyl group as a substituent. Chiral ligands are employed, along with transition metal catalysts. The methods of the invention are effective in providing enantioconvergent allylation of chiral molecules.
An Efficient Protocol for the Palladium-Catalyzed Asymmetric Decarboxylative Allylic Alkylation Using Low Palladium Concentrations and a Palladium(II) Precatalyst
作者:Alexander N. Marziale、Douglas C. Duquette、Robert A. Craig、Kelly E. Kim、Marc Liniger、Yoshitaka Numajiri、Brian M. Stoltz
DOI:10.1002/adsc.201500253
日期:2015.7.6
catalytic allylic alkylation for the synthesis of 2‐alkyl‐2‐allylcycloalkanones and 3,3‐disubstituted pyrrolidinones, piperidinones and piperazinones has been previously reported by our laboratory. The efficient construction of chiral all‐carbon quaternary centers by allylic alkylation was previously achieved with a catalyst derived in situ from zero‐valent palladium sources and chiral phosphinooxazoline
ASYMMETRIC CATALYTIC DECARBOXYLATIVE ALKYL ALKYLATION USING LOW CATALYST CONCENTRATIONS AND A ROBUST PRECATALYST
申请人:Stoltz Brian M.
公开号:US20160280623A1
公开(公告)日:2016-09-29
This invention provides efficient and scalable enantioselective methods that yield 2-alkyl-2-allylcycloalkyanone compounds with quaternary stereogenic centers. Methods include the method for the preparation of a compound of formula (I):
comprising treating a compound of formula (II) or (III):
with a palladium (II) catalyst under alkylation conditions.