Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Hirohisa Tsuzuki"'
Publikováno v:
New Journal of Chemistry. 26:1035-1042
The selective introduction of one or two acetyl groups by direct replacement of tert-butyl groups via the ipso aromatic acetylation of meta-bridged aromatic compounds having two arene rings is described. Acetylation of syn- and anti-di-tert-butyl[n.2
Publikováno v:
Canadian Journal of Chemistry. 79:1422-1430
An attempted O-alkylation of the flexible macrocycle tetrahydroxy[3.1.3.1]metacyclophane (1) with 4-(chloromethyl) pyridine (2a) in the presence of NaH under THF reflux gave 1,3-di-O-substitution product distal-3a as a major product. In contrast, tet
Publikováno v:
European Journal of Organic Chemistry. 2001:1069-1075
Publikováno v:
New Journal of Chemistry. 25:728-736
anti- and syn-[2.8]Metacyclophan-1-enes 3a, which are both conformationally rigid structures, were prepared in good yields by a McMurry cyclization of 1,8-bis(5-tert-butyl-3-formyl-2-methoxyphenyl)octane 2a. Similarly, McMurry cyclization of 1,10-bis
Publikováno v:
New Journal of Chemistry. 25:434-439
[2.1.1]Orthocyclophanes 2 are prepared by pyrolysis of the corresponding 2-thia[3.1.1]orthocyclophane 2,2-dioxides 9, which are prepared by the reaction of 1,2-bis(2-bromomethylbenzyl)benzenes 7 with Na2S in ethanol under high dilution conditions, fo
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :2089-2097
A series of syn- and anti-[2.n]metacyclophan-1-enes and [2.n]metacyclophane-1,2-diols are prepared in good yields by a McMurry cyclization of 1,n-bis(5-acetyl-2-methoxyphenyl)alkanes. Interestingly, in the same coupling reaction in the absence of pyr
Publikováno v:
Canadian Journal of Chemistry. 78:1089-1099
A series of [n.2]metacyclophanenes (3) and (6) were prepared in good yields by a McMurry cyclization of 1,n-bis(3-acetyl-4-methoxyphenyl)alkanes (2) and 1,3-bis(3-formyl-4-methoxyphenyl)propane (5), respectively. Compounds 3b, 3c exist in the syn-con
Publikováno v:
Tetrahedron Letters. 41:5865-5868
Reduction of aromatic rings such as phenol, naphthalenes, biphenyls, acenaphthene, and acenaphthylene was smoothly performed using a Raney Ni–Al alloy in dilute aqueous alkaline solution without any organic solvents at 90°C under atmospheric press
Publikováno v:
Canadian Journal of Chemistry. 78:238-247
The acylation of 8-methyl- (1b) and 8-methoxy[2.2]metaparacyclophane 1c with 1.1 equiv. of acetyl chloride in CS2 solution in the presence of aluminum chloride afforded 15-acetyl-8-methyl- (2b) and 12-acetyl-8-methoxy[2.2]metaparacyclophanes (3c) wit
Autor:
Hideki Sugihara, Yasuhiro Suga, Hirohisa Tsuzuki, Shigeo Murata, Kochurani Jacob, Takashi Arimura
Publikováno v:
Synthesis. 2000:1543-1546