New light on an old reaction: phase-transfer-catalyzed intramolecular cyclization of propargyl compounds for synthesis of indene derivatives and disubstituted benzo[b]furans
A variety of indene derivatives and disubstituted benzo[b]furans are readily prepared under the mild reaction condition from propargylic compounds by phase-transfer catalysis (PTC) instead of metal catalysis.
在温和的反应条件下,通过相转移催化(PTC)代替金属催化,由炔丙基化合物可轻松制得各种茚衍生物和二取代的苯并[ b ]呋喃。
Highly Regioselective Synthesis of Indene Derivatives Including an Allene Functional Group via Pd/C-Catalyzed Cyclization Reaction in Air
Indene derivatives including an allene functional group are readily prepared in moderate to excellent yields with high regioselectivity under very mild reaction conditions by the Pd/C-catalyzed reaction of propargylic compounds. The resulting products can be further elaborated using Pd-catalyzed annulation reactions.
Highly Regioselective Synthesis of Spirocyclic Compounds by a Palladium-Catalyzed Intermolecular Tandem Reaction
We have disclosed a very nice advance of nickel(II)-catalyzed carboannulation reactions. Highly substituted indene derivatives are readily prepared in moderate to excellent yields under very mild reaction conditions in air via a nickel (II)-catalyzed cyclization of propargylic compounds with soft nucleophiles.
Highly Regio- and Stereoselective Synthesis of Indene and Benzo[<i>b</i>]furan Derivatives via a Pd-Catalyzed Carboannulation of Propargyl Carbonates with Nucleophiles
A new and efficient synthesis of indene and benzo[b]furan derivatives has been achieved via Pd-catalyzed carboannulation of propargyl carbonates with nucleophiles in good to excellent yields with high regio- and stereoselectivity. A novel sequence of nucleophilic attack is observed, and a possible mechanism is proposed.
通过钯催化碳酸炔丙基酯与亲核试剂的碳环化反应,实现了茚和苯并[ b ]呋喃衍生物的新型高效合成,具有良好的产率和良好的区域选择性和立体选择性。观察到一种新型的亲核攻击序列,并提出了可能的机制。