Synthesis of homophthalates, 2-(Arylsulfonyl)pyridines, 6-(Thien-2-yl)salicylates, Dibenzo[b,d]pyran-6-ones, Trifluoromethyl- and Fluoro-substituted biaryls by [4+2] and [3+3] cyclizations of 1,3-Bis(silyloxy)-1,3-butadienes Hussain, Ibrar , 1979- Text theses Text Hochschulschrift 2008 2008 eng electronic resourceremoteComputermedienOnline-RessourceOnline-Ressource graph. Darst. One-pot cyclization reactions of 1,3-bis(silyl enol ethers) with the different electrophiles provide a convenient approach for the synthesis of various complex carbacycles and heterocycles from simple starting materials. 6-Hetaryl-salicylates and 4-Aryl and 4-Hetaryl-salicylates were prepared based on [3+3] cyclizations of 1,3-bis(sily enol ethers) in an efficient way. Dibenzo[b,d]pyran-6-ones were synthesized by formal [3+3] cyclization of 1,3-bis(silyl enol ethers) with 1-(2-methoxyphenyl)-1-(trimethylsilyloxy)alk-1-en-3-ones and subsequent BBr3-mediated lactonization. Aryl fluorides were synthesized by [3+3] cyclization of 1,3-bis(silyl enol ethers) with 2-fluoro-3-silyloxy-2-en-1-ones. 1,3-Bis(silyl enol ethers) were used efficiently for the synthesis of highly functionalized homomphthalates and 4-hydoxypyridines based on [4+2] cyclization reactions. vorgelegt von Ibrar Hussain Rostock, Univ., Mathematisch-Naturwiss. Fak., Diss., 2008 540 35.69 http://rosdok.uni-rostock.de/resolve?urn=urn:nbn:de:gbv:28-diss2008-0072-2 http://rosdok.uni-rostock.de/resolve?urn=urn:nbn:de:gbv:28-diss2008-0072-2&pdf http://nbn-resolving.de/urn:nbn:de:gbv:28-diss2008-0072-2 Synthesis of homophthalates, 2-(Arylsulfonyl)pyridines, 6-(Thien-2-yl)salicylates, Dibenzo[b,d]pyran-6-ones, Trifluoromethyl- and Fluoro-substituted biaryls by [4+2] and [3+3] cyclizations of 1,3-Bis(silyloxy)-1,3-butadienes--(DE-627)574036962 urn:nbn:de:gbv:28-diss2008-0072-2 oclc: 301995934 ppn: (DE-627)577875213