γ-Regioselectivity of lithiated 2-buten-4-olide towards aromatic aldehydes: a simple synthesis of γ-arylidenebutenolides
摘要:
Lithiated 2-buten-4-olide was found to react with aromatic aldehydes regioselectively at gamma-position to provide 4-(1-aryl-1-hydroxymethyl)-2-buten-4-olides which could be readily converted into the corresponding (Z)-gamma-arylidenebutenolides. (C) 1998 Elsevier Science Ltd. All rights reserved.
Catalytic, Enantioselective Vinylogous Mukaiyama Aldol Reaction of Furan-Based Dienoxy Silanes: A Chemodivergent Approach to γ-Valerolactone Flavan-3-ol Metabolites and δ-Lactone Analogues
作者:Claudio Curti、Nicoletta Brindani、Lucia Battistini、Andrea Sartori、Giorgio Pelosi、Pedro Mena、Furio Brighenti、Franca Zanardi、Daniele Del Rio
DOI:10.1002/adsc.201500705
日期:2015.12.14
a set of hydroxyphenyl γ-valerolactones was achieved starting from 2-silyloxyfuran and alkoxy-substituted benzaldehydes as common precursors. Key synthesis steps included an enantioselective vinylogous Mukaiyamaaldolreaction and a Barton–McCombie deoxygenation. Five enantioenriched γ-valerolactone targets were obtained in 5–6 steps, 18–63% overall yields and 82–98 % ee, paving the way for the straightforward
Organocatalyzed Highly Enantioselective and anti-Selective Construction of γ-Butenolides through Vinylogous Mukaiyama Aldol Reaction
作者:Ning Zhu、Bao-Chun Ma、Yong Zhang、Wei Wang
DOI:10.1002/adsc.201000099
日期:——
The formation of chiral γ‐butenolides has been achieved with good yields (up to 90%), high enantioselectivity (up to 91%) and diastereoselectivity (up to 9/1, anti‐selective) through an organocatalyzed vinylogous Mukaiyamaaldolreaction of 2‐(trimethylsilyloxy)furan and aldehydes. A wide range of chiral γ‐butenolides was obtained under mild conditions by this methodology.
The first organocatalytic addition of 2-trimethylsilyloxyfuran to carbonyl compounds: hydrogen-bond catalysis in γ-butenolides synthesis
作者:Margherita De Rosa、Lucia Citro、Annunziata Soriente
DOI:10.1016/j.tetlet.2006.09.143
日期:2006.11
This letter describes the first example of diastereoselective 'organocatalyzed' synthesis of the butenolide products substituted at the gamma-position by a chain bearing hydroxyl groups. The urea-derivative 4 has proved to be an efficient catalyst for the addition of the commercial TMSOF to carbonyl compounds under solvent-free conditions. The reaction conditions and generality of the procedure have been examined. (c) 2006 Elsevier Ltd. All rights reserved.
γ-Regioselectivity of lithiated 2-buten-4-olide towards aromatic aldehydes: a simple synthesis of γ-arylidenebutenolides
Lithiated 2-buten-4-olide was found to react with aromatic aldehydes regioselectively at gamma-position to provide 4-(1-aryl-1-hydroxymethyl)-2-buten-4-olides which could be readily converted into the corresponding (Z)-gamma-arylidenebutenolides. (C) 1998 Elsevier Science Ltd. All rights reserved.
ZEOLITE MEDIATED STEREOSELECTIVE SYNTHESIS OF γ-ALKYLIDENEBUTENOLIDES
作者:N. Sundar、Mrinal K. Kundu、P. Veera Reddy、G. Mahendra、Sujata V. Bhat
DOI:10.1081/scc-120004083
日期:2002.1.1
Stereoselective synthesis of Z-gamma-alkylidenebutenolides has been achieved through H-ZSM 5 mediated dehydration.