Gold-Catalyzed Ring Expansion of Enyne-Lactone: Generation and Transformation of 2-Oxoninonium
摘要:
An efficient gold-catalyzed ring-expansion reaction of enyne-lactones to form 2-oxoninonium intermediates is reported. The 2-oxoninonium generated in this work could undergo further 6 pi electrocyclization and aromatization reaction to produce different aromatic compounds.
Regioselective synthesis of poly-substituted naphthalenes via a Pd-catalyzed cyclization of modified Baylis–Hillman adducts: selective 6-endo Heck reaction and an aerobic oxidation cascade
作者:Se Hee Kim、Sangku Lee、Hyun Seung Lee、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2010.09.127
日期:2010.12
of modified Baylis–Hillman adducts having an o-bromophenyl acetonitrile moiety at the secondary position, in reasonable yields. The reaction involved a sequential 6-endo Heck reaction and an aerobicoxidation process.
changes in the starting material (see scheme) resulted in rather different compounds in palladium‐catalyzed domino reactions. A novel tetracyclic butterfly‐like scaffold was constructed in a one‐pot reaction via the Pd‐catalyzed 5‐exo‐trig carbopalladation and arylationcascade in high yield.
A novel method for the generation of o-quinodimethane (o-QDM) intermediates is reported using a mild and efficient base-promoted ring-opening of benzo[c]oxepines. Among the benzo[c]oxepines studied, indanone containing analogues demonstrated the greatest variety of reactivity. A number of decay modes were observed, in addition with trapping of the o-QDM intermediates using dienophiles for the synthesis
报道了一种使用温和有效的碱促苯并[ c ]氧杂环丁烷的开环方法来生成邻喹啉甲烷(o- QDM)中间体的新方法。在所研究的苯并[ c ]氧杂环丁烷中,含茚满酮的类似物表现出最大的反应活性。除了使用二烯亲和剂捕获邻-QDM中间体以合成具有高区域选择性的多取代四氢萘外,还观察到许多衰变模式。这项研究提供了一种从苯并[ c ] oxepine前体生成o -QDM中间体的新方法。
Regioselective Synthesis of Fluorenones via the Consecutive In-Mediated Barbier Reaction, Pd-Catalyzed Cyclization, and Friedel-Crafts Reaction Starting from Baylis-Hillman Adducts
作者:Ko-Hoon Kim、Sung-Hwan Kim、Ka-Young Lee、Jae-Nyoung Kim
DOI:10.5012/bkcs.2011.32.4.1387
日期:2011.4.20
WILDEMAN J.; BORGEN P. C.; PLUIM H.; ROUWETTE P. H. F. M.; LEUSEN A. M. V+, TETRAHEDRON LETT., 1978, NO 25, 2213-2216
作者:WILDEMAN J.、 BORGEN P. C.、 PLUIM H.、 ROUWETTE P. H. F. M.、 LEUSEN A. M. V+