Base-Mediated Tandem Reaction Consisting of an Acyl Shift Strategy Leading to 4,5-Disubstiuted Furan-2(5H)-ones
作者:Yong Lei、Zhi-Qiang Wang、Ye-Xiang Xie、Shang-Ci Yu、Bo-Xiao Tang、Jin-Heng Li
DOI:10.1002/adsc.201000762
日期:2011.1.10
The first example of the synthesis of 4,5‐disubstiuted furan‐2(5H)‐ones by base‐mediated tandemacylshift/cyclization/decarbonylation reactions of aroylmethyl 2‐alkynoates has been developed. This new and inexpensive tandem route allows both a CO bond and a Csp3Csp2 bond forming in one step involving an unprecedented acyl rearrangement process.
The present invention relates to an improved process for the preparation of Lacosamide of Formula (I), comprising: O-methylating a compound of Formula (V) or a compound of Formula (XX) or a compound of Formula XXII; in the presence of a methylating agent and a base to produce Lacosamide of Formula (I).
Kinetic Resolution and Dynamic Kinetic Resolution of γ‐Aryl‐Substituted Butenolides via Copper‐Catalyzed 1,4‐Hydroboration
作者:Soyeon Lee、Do Hyun Ryu、Jaesook Yun
DOI:10.1002/adsc.202001353
日期:2021.4.27
Kinetic resolution (KR) and dynamic kinetic resolution (DKR) of γ‐aryl and heteroaryl‐substitutedbutenolides via CuH‐catalyzed 1,4‐hydroboration using pinacolborane is reported. With a copper‐Ph‐BPE catalyst, selectivity factors were extremely high (s=>400) with regard to the kinetic resolution of β‐methyl‐γ‐phenyl butenolide; DKR was possible in the presence of an amine base (DBU), which facilitated racemization
Neue synthesen und reaktionen ungesättigter heterotitanacyclen
作者:Stefan Dürr、Udo Höhlein、Rainer Schobert
DOI:10.1016/0022-328x(93)80460-s
日期:1993.10
fragment by carbon (formation of vinylenic carbonates and the thia-derivatives of these) or by further heteroatoms like boron or phosphorus (formation of boroles and phosphoric acid derivatives), thus retaining the cyclofunctionality. Alternatively, some of the new chelate complexes can be readily CC-chain-lengthened via a deprotonating/alkylating sequence, leaving the metallacycle unaffected.
Synthese von 2-Oxo-5H-furanen unter Wittig-Horner Bedingungen
作者:Gioacchino Falsone、H. Peter Wingen
DOI:10.1002/ardp.19843170913
日期:——
Es wird die Synthese der 2‐Oxo‐5H‐furane 3a‐e und 7a‐e aus den α‐Hydroxy‐oxo‐verbindungen 1a, b bzw. den α‐Halogen‐oxo‐verbindungen 5a‐e und den α‐Phosphonocarbonsäureestern 2a‐c, α‐Phosphonocarbonsäuren 4a, b bzw. den Kaliumsalzen der α‐Phosphonocarbonsäuren 6a, b unter Wittig‐Horner‐Bedingungen beschrieben.