One-Pot Synthesis of Spirocyclopenta[<i>a</i>]indene Derivatives via a Cascade Ring Expansion and Intramolecular Friedel–Crafts-Type Cyclization
作者:Quanzhe Li、Jiaxin Liu、Yin Wei、Min Shi
DOI:10.1021/acs.joc.9b03126
日期:2020.2.21
A one-pot efficient synthetic approach for the rapid construction of spirocyclopenta[a]indene derivatives has been developed via an iodine-initiated cascade ring expansion and intramolecular Friedel-Crafts-type cyclization from propargyl alcohol-tethered alkylidenecyclobutanes under mild conditions with broad substrate scope. This cascade process can be elegantly conducted on a gram scale. A plausible
A concise synthesis of 1‐naphthols via cyclization of o‐iodoacetophenones and methyl ketones has been realized under very mild conditions. The cyclization process is initiated by a rare copper‐catalyzed arylation of simple methyl ketones with ortho‐iodoacetophenones.
Palladium Nanoparticles‐Catalyzed Synthesis of Indanone Derivatives via Intramolecular Reductive Heck Reaction
作者:Naziya Parveen、Govindasamy Sekar
DOI:10.1002/adsc.201900752
日期:2019.10.8
An efficient protocol for the straightforward, single‐step synthesis of 3‐aryl‐1‐indanones from 2′‐iodochalcone via reductive Heckreaction using phosphine free, stable and reusable binaphthyl stabilized palladium nanoparticle (Pd‐BNP) as a catalyst has been described. An immense array of substrate scope with electron‐rich and deficient 2′‐iodochalcones have been synthesized. Further derivatization
A Pd-catalyzed cascade Ullmann coupling–aldol–dehydration reaction of ortho-acylphenyl iodides affords colchino analogues with wide functional group tolerance.
Abstract An efficient synthesis of 2-amino-3-methylenephthalimide through palladium-catalyzedintramolecular aminocarbonylation has been developed. The reaction carried out under atmospheric pressure of CO and provided diversified 2-amino-3-methylenephthalimides in reasonable to good yields from o-iodoacetophenone phenylhydrazone, which are readily derived from phenylhydrazines and 2-iodoacetophenones
摘要 开发了一种通过钯催化的分子内氨基羰基化有效合成 2-氨基-3-亚甲基邻苯二甲酰亚胺的方法。该反应在 CO 的大气压下进行,并从邻碘苯乙酮苯腙中以合理到良好的产率提供多样化的 2-氨基-3-亚甲基邻苯二甲酰亚胺,其易于从苯肼和 2-碘苯乙酮衍生。图形概要