Formal [6+3] cycloaddition of fulvenes with 2H-azirine: a facile approach to the [2]pyrindines system
摘要:
2H-Azirine reacts with fulvenes to give either alkylated fulvene azirines (ultrasound) or the formal [6+3] cycloaddition adducts (Lewis acid). The later constitutes an efficient and novel route to [2]pyrindines. (C) 2003 Elsevier Ltd. All rights reserved.
Übergangsmetall-fulven-komplexe XXXIII. Synthese und struktur von fulven-komplexen des cobalts und rhodiums
作者:Doris Rau、Ulrich Behrens
DOI:10.1016/0022-328x(90)80026-v
日期:1990.5
Diarylfulvenes react with (C5H5)Co(C2H4)2 to give the η4-coordinated fulvene complexes (C5H5)2Co(fulvene) (3). Reaction of (C5H5)Rh(C2H4)2 or (C9H7)Rh (C2H4)2 (C9H7 = indenyl) with diphenylfulvene yields the compounds (C5H5)Rh(η4-fulvene) (4) or (C9H7)Rh(η4-fulvene) (5), respectively. An X-ray diffraction study confirms an η5-coordination for the indenyl and η4-coordination for the fulvene ligand in
Diarylfulvenes与(C反应5 ħ 5)有限公司(C 2 H ^ 4)2,得到η 4配位的亚甲基环戊二烯配合物(C 5 H ^ 5)2的Co(富烯)(3)。(C 5 H 5)Rh(C 2 H 4)2或(C 9 H 7)Rh(C 2 H 4)2(C 9 H 7 =茚基)与二苯基富勒烯的反应产生化合物(C 5 H 5)的Rh(η 4 -fulvene)(4)或(C 9 H ^ 7)的Rhη(4 -fulvene)(5)表示。的X射线衍射研究证实一个η 5的茚基和η-coordination 4 -coordination用于类型的复合物中的富烯配体5。为了比较,还确定了双(二甲基氨基苯基)富烯的结构。
Broad Scope [4 + 2] Cycloaddition of <i>o</i>-Carboryne with Pentafulvenes Using 1-Li-2-OTf-<i>o</i>-C<sub>2</sub>B<sub>10</sub>H<sub>10</sub> as Precursor
作者:Jie Zhang、Zaozao Qiu、Zuowei Xie
DOI:10.1021/acs.organomet.7b00574
日期:2017.10.9
from 1-Li-2-OTf-o-C2B10H10 undergoes an efficient [4 + 2] cycloaddition with pentafulvenes at room temperature to give a series of carboranonorbornenes in good to high isolated yields. This reaction is compatible with many functional groups and has a very broad substrate scope from 6-mono- to 6,6′-disubstituted pentafulvenes and from alkyl to aryl substituents. Further transformations of the resultant
从1-Li-2-OTf- o -C 2 B 10 H 10原位生成的邻-碳硼烷(1,2-脱氢-邻-甲硼烷)在室温下进行有效的[4 + 2]环戊五烯加成反应,得到一系列高或高分离产率的碳硼烷降冰片烯。该反应与许多官能团相容,并且具有非常宽的底物范围,从6-单-至6,6'-二取代的五氟戊烯和从烷基至芳基取代基。已经对所得的[4 + 2]环加成产物进行了进一步的转化,从而提供了各种多功能的邻氨基甲酸酯。
Diels-Alder Reaction of<i>o</i>-Carboryne with Fulvenes: Synthesis of Carboranonorbornadienes and Their Transformations
作者:Jie Zhang、Zaozao Qiu、Peng-Fei Xu、Zuowei Xie
DOI:10.1002/cplu.201402129
日期:2014.7
o‐Carboryne (1,2‐dehydro‐o‐carborane) generated in situ from the precursor 1‐iodo‐2‐lithio‐o‐carborane reacts with 6,6′‐diarylfulvenes to give a series of carboranonorbornadienes in moderate yields with excellent regioselectivity. The resultant [4+2] cycloadducts can be further derivatized, thus leading to the formation of a variety of highly functionalized carboranes. This study shows that such Diels–Alder
Pentafulvenes with alkyl and/or aryl substituents at the exocyclic position are formed rapidly in high yields through reaction of crystalline sodium cyclopentadienide directly with the appropriate ketones.
We have developed thioxanthylium photoredox catalyzed [4 + 2] cycloaddition of pentafulvenes at room temperature under green light irradiation, which affords tetrahydrocyclopenta[b]chromenes with high regioselectivities. The present reaction provides a sustainable approach to carry out the cycloaddition of pentafulvenes without the use of transition metal catalysts or high-temperature conditions. This
我们开发了在室温下绿光照射下硫代黄鎓光氧化还原催化的五富烯的 [4 + 2] 环加成反应,得到具有高区域选择性的四氢环戊二烯[ b ]色烯。本反应提供了一种可持续的方法来进行五富烯的环加成,而无需使用过渡金属催化剂或高温条件。该程序可以温和而直接地获得 1,3a,9,9a-四氢环戊二烯[ b ]色烯。反应的量子产率(Φ =0.15)表明反应主要通过光催化途径进行。