Liquid Enol Ethers and Acetates as Gaseous Alkyne Equivalents in Rh-Catalyzed Chemo- and Regioselective Formal Cross-Alkyne Cyclotrimerization
作者:Hiromi Hara、Masao Hirano、Ken Tanaka
DOI:10.1021/ol800813g
日期:2008.6.1
A cationic rhodium(I)/rac-BINAP complex catalyzes chemo- and regioselective formal cross-cyclotrimerizations of alkynes with enol ethers or acetates. Commercially available and cheap liquid enol ethers and acetates could be used as convenient gaseous alkyne equivalents in the present rhodium catalyses.
CYCLOPARA (HETERO) ARYLENE COMPOUND AND METHOD FOR PRODUCING SAME
申请人:Yamago Shigeru
公开号:US20120220790A1
公开(公告)日:2012-08-30
Provided are a cyclopara(hetero)arylene compound and a method for producing the same. More specifically, provided is a cycloparaphenylene compound represented by Formula (I):
wherein Ar
1
, Ar
2
, Ar
3
, and Ar
4
are the same or different, and represent an optionally substituted divalent aromatic group or an optionally substituted divalent heteroaromatic group, and
n1, n2, n3, and n4 are the same or different, and represent an integer of 1 or more.
US8895768B2
申请人:——
公开号:US8895768B2
公开(公告)日:2014-11-25
Commercially available liquid enol ethers and acetates as gaseous alkyne equivalents in cationic Rh(I)/BINAP-catalyzed chemo- and regioselective formal cross-alkyne cyclotrimerizations
作者:Hiromi Hara、Masao Hirano、Ken Tanaka
DOI:10.1016/j.tet.2009.02.047
日期:2009.6
A cationicrhodium(I)/BINAPcomplex catalyzes partial intramolecular [2+2+2] cycloadditions of 1,6- and 1,7-diynes with enol ethers or a ketene acetal giving substituted benzenes in good yields. The same catalyst also catalyzes complete intermolecular [2+2+2] cycloadditions of two different monoynes with enol acetates giving tri- and tetrasubstituted benzenes in good yields with complete regioselectivity