Enantioselective decarboxylative alkylation reactions: catalyst development, substrate scope, and mechanistic studies.
Enantioselective decarboxylative alkylation reactions: catalyst development, substrate scope, and mechanistic studies.
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对映选择性脱羧烷基化反应:催化剂的发展,底物范围和机械研究。
DOI:
10.1002/chem.201003383
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发表时间:
2011-12-09
影响因子:
4.3
通讯作者:
Stoltz, Brian M.
中科院分区:
文献类型:
--
作者:
Behenna, Douglas C.;Mohr, Justin T.;Sherden, Nathaniel H.;Marinescu, Smaranda C.;Harned, Andrew M.;Tani, Kousuke;Seto, Masaki;Ma, Sandy;Novak, Zoltan;Krout, Michael R.;McFadden, Ryan M.;Roizen, Jennifer L.;Enquist, John A., Jr.;White, David E.;Levine, Samantha R.;Petrova, Krastina V.;Iwashita, Akihiko;Virgil, Scott C.;Stoltz, Brian M.
α-Quaternary ketones are accessed through novel enantioselective alkylations of allyl and propargyl electrophiles by unstabilized prochiral enolate nucleophiles in the presence of palladium complexes with various phosphinooxazoline (PHOX) ligands. Excellent yields and high enantiomeric excesses are obtained from three classes of enolate precursors: enol carbonates, enol silanes, and racemic β-ketoesters. Each of these substrate classes functions with nearly identical efficiency in terms of yield and enantioselectivity. Catalyst discovery and development, the optimization of reaction conditions, the exploration of reaction scope, and applications in target-directed synthesis are reported. Experimental observations suggest that these alkylation reactions occur through an unusual inner-sphere mechanism involving binding of the prochiral enolate nucleophile directly to the palladium center.
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影响因子:
2.8
作者:
Albéniz, AC;Catalina, NM;Redón, R
通讯作者:
Redón, R
影响因子:
--
作者:
Avalos, M;Babiano, R;Palacios, JC
通讯作者:
Palacios, JC
影响因子:
2.1
作者:
Baldwin, JE;Adlington, RM;Russell, AT
通讯作者:
Russell, AT
DOI:
10.1039/c39920001084
发表时间:
1992-08-01
影响因子:
--
作者:
BALEGROUNE, F;GRANDJEAN, D;MATT, D
通讯作者:
MATT, D
影响因子:
1.8
作者:
BIENAYME, H
通讯作者:
BIENAYME, H