A simple approach to 2-substituted-4-furanmethanol compounds
摘要:
A two step synthesis of the title compounds from easily available starting materials is reported. The method involves a Horner-Wadsworth-Emmons reaction between beta-ketophosphonates and 1,3-diacetoxy-2-propanone, followed by mild acid treatment of the gamma,gamma'-diacetoxyenones thus obtained. (C) 1997 Elsevier Science Ltd.
A Direct Synthesis of Highly Substituted π‐Rich Aromatic Heterocycles from Oxetanes
作者:Alexander R. White、Ryan A. Kozlowski、Shiou‐Chuan Tsai、Christopher D. Vanderwal
DOI:10.1002/anie.201704119
日期:2017.8.21
five-membered heterocycles has driven the development of new methods for their synthesis for more than a century. Here, we disclose a general and reliable reaction manifold for the construction of highly substituted heterocycles through a facile Lewis-acid-catalyzed oxetane rearrangement. Notably, this methodology employs a keto-oxetane motif as a 1,4-dicarbonyl surrogate, which can be synthesized using
New access to carbonyl ylides by the silicon-based 1,3-elimination and their [3 + 2] cycloadditions to activated alkenes and alkynes: One-step synthesis of dihydrofurans and tetrahydrofurans
Simple aryl-substituted carbonylylides are generated by the silicon-based 1,3-elimination of chloromethyl trimethylsilyl(α-aryl)methyl ethers promoted by flouride ion under mild and neutral conditions which provide an one-step synthesis of dihydrofurans and tetrahydrofurans via [3 + 2] cycloadditions to activated multiple π-bonds such as α,β-unsaturated alkenes and alkynes.
Bi(III)-Catalyzed Synthesis of Substituted Furans from Hydroxy-oxetanyl Ketones: Application to Unified Total Synthesis of Shikonofurans J, D, E, and C
Further, it demonstrated the utility of this method in the first enantioselective total synthesis of furyl-hydroquinone-derived biologically potent natural products shikonofurans J, D, E, and C in seven linear steps, starting from readily available building blocks of 2,5-dihydroxy acetophenone and 3-oxetanone employing chiral-phosphoric acid (TRIP)-catalyzed asymmetric prenylation as a key step to induce
COMPOUNDS USEFUL AS ANTIVIRAL AGENTS, COMPOSITIONS, AND METHODS OF USE
申请人:Wang Guoxin
公开号:US20130090339A1
公开(公告)日:2013-04-11
Novel 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives that are effective for use in treating viral infections are described. Also described are pharmaceutical compositions comprising the 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives and methods for using the compounds or compositions.