ChemInform Abstract: New Light on an Old Reaction: Phase-Transfer-Catalyzed Intramolecular Cyclization of Propargyl Compounds for Synthesis of Indene Derivatives and Disubstituted Benzo[b]furans.

ChemInform ◽  
2012 ◽  
Vol 43 (27) ◽  
pp. no-no
Author(s):  
Peng-Shuai Sun ◽  
Jie Hu ◽  
Xiang-Chuan Wang ◽  
Lei Liu ◽  
Yong-Min Liang
Keyword(s):  
Intramolecular Cyclization ◽  
Phase Transfer ◽  
Reaction Phase

Phase-Transfer-Catalyzed Intramolecular Cyclization ofortho-Alkynyl Phenyl Ether Derivatives for Synthesis of 2,3-Disubstituted Benzo[b]furans

2010 ◽  
Vol 352 (2-3) ◽  
pp. 351-356 ◽  
Author(s):  
Jie Hu ◽  
Lu-Yong Wu ◽  
Xiang-Chuan Wang ◽  
Yuan-Yuan Hu ◽  
Yan-Ning Niu ◽  
...  
Keyword(s):  
Intramolecular Cyclization ◽  
Phase Transfer ◽  
Phenyl Ether

ChemInform Abstract: Phase-Transfer-Catalyzed Intramolecular Cyclization of ortho-Alkynyl Phenyl Ether Derivatives for Synthesis of 2,3-Disubstituted Benzo[b]furans.

ChemInform ◽  
2010 ◽  
Vol 41 (26) ◽  
pp. no-no
Author(s):  
Jie Hu ◽  
Lu-Yong Wu ◽  
Xiang-Chuan Wang ◽  
Yuan-Yuan Hu ◽  
Yan-Ning Niu ◽  
...  
Keyword(s):  
Intramolecular Cyclization ◽  
Phase Transfer ◽  
Phenyl Ether

Concise Synthesis of GB22 by Endo-Selective Siloxycyclopropane Arylation

2019 ◽  
Author(s):  
Hannah E. Burdge ◽  
Takuya Oguma ◽  
Takahiro Kawajiri ◽  
Ryan Shenvi
Keyword(s):  
Intramolecular Cyclization ◽  
Cross Coupling ◽  
Building Blocks ◽  
Ring Expansion ◽  
Dual Catalysis ◽  
Acid Labile

<div><div><div><p>The first synthesis of GB22 was accomplished by a con- cise, modular route. Two building blocks converged in a novel sp3-sp2 attached-ring coupling that used Ir/Ni dual-catalysis to reverse the regioselectivity of siloxycy- clopropane arylation. This cross-coupling proved general to access β-substituted tetralones via ring-expansion of indanone-derived siloxycyclopropanes. The congested, bridging rings of the GB alkaloids were completed using an aluminum-HFIP complex that effected intramolecular cyclization of an acid-labile substrate.</p></div></div></div>

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