Yazar "Balcı, Metin" için listeleme
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The effect of the double bond pyramidalization on the mode of the bromination reaction: Bromination of benzobicyclononadiene
Balcı, Metin; Güney, Murat; Daştan, Arif; Azizoğlu, Akın (Amer Chemical Soc, 2007)The bromination of 6,7,8,9-tetrahydro-5H-5,9-ethenobenzo[a][7]annulene yielded regio- and stereospecifically formed dibromides arising from the alkyl shift where the bromine exclusively attacks the double bond from the ... -
Endo- and exo-configured cyclopropylidenes ıncorporated into the norbornadiene skeleton: generation, rearrangement to allenes, and the effect of remote substituents on carbene stability
Kılbaş, Benan; Azizoğlu, Akın; Balcı, Metin (Amer Chemical Soc, 2009)For the synthesis of endo-configured cyclopropylidenes annelated to benzonorbornadiene, first the exo-bridge hydrogen in benzonorbornadiene was blocked with ethyl, bromine, and methoxy groups. All efforts to add dichloro-, ... -
Incorporation of an allene unit into alpha-pinene via beta-elimination
Kılbaş, Benan; Azizoğlu, Akın; Balcı, Metin (Wiley-V C H Verlag Gmbh, 2006)The two double-bond isomers 3-iodo-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene (6b) and 3-iodo-4,6,6-trimethylbicyclo[3.1.1]hept-2-ene (11) were synthesized by reacting 2,6,6-trimethylbicyclo[3.1.1]heptan-3-one (9) with ... -
Incorporation of an allene unit into alpha-pinene: Generation of the cyclic allene 2,7,7-trimethylbicyclo[4.1.]octa-2,3-diene and its dimerization
Azizoğlu, Akın; Özen, Recep; Hökelek, Tuncer; Balcı, Metin (Amer Chemical Soc, 2004)The reaction of etheral methyllithium with 3,3-dibromo-2,7,7-trimethyl-tricyclo[4.1.1.0.(2,4)] octane (2) was investigated. The generated carbene 12 undergoes intramolecular C-H insertion to provide the tetracyclic hydrocarbon ... -
Low and high temperature bromination of exocyclic dienes: high temperature bromination. Part 16
Horasan, Nuray; Kara, Yunus; Azizoğlu, Akın; Balcı, Metin (Pergamon-Elsevier Science Ltd, 2003)The electrophilic addition of bromine to an exocyclic diene, 5,6-dimethylenebicyclo[2.2.1]hept-2-ene, in CCl4 at 0degreesC led to the formation of non-rearranged (73%) and rearranged products (27%). However, high temperature ... -
A new and short synthesis of 7H-benzo[a]cyclohepten-7-one and some derivatives: Oxidation of 7-bromo-5H-benzo[a]cycloheptene
Daştan, Arif; Yıldız, Yaşar Kemal; Balcı, Metin (Marcel Dekker Inc, 2001)Oxidation of 7-bromo-5H-benzo[a]cycloheptene with some oxidation reagents has been studied. Several 2,3- and 4,5-benzotropone derivatives has been obtained. The structures of the products were determined by H-1-, (CNMR)-C-13 ... -
A new synthesis of bromobenzotropones: Oxidation of 8-bromo-5H-benzo[a]cycloheptene
Daştan, Arif; Yıldız, Yaşar Kemal; Kazaz, Cavit; Balcı, Metin (Scientific Technical Research Council Turkey, 2002)The oxidation of 8-bromo-5H-belizo[a]cycloheptene with some oxidation reagents was studied. 2,3-and 4,5-benzotropone derivatives were obtained. The structures of the bromobenzotropones were determined by H-1- and C-13-NMR data. -
Substituent effects on the ring-opening mechanism of lithium bromocyclopropylidenoids to allenes
Azizoğlu, Akın; Balcı, Metin; Mieusset, Jean-Luc; Brinker, Udo H. (Amer Chemical Soc, 2008)The ring-opening reactions of lithium bromocyclopropylidenoids to allenes have been investigated computationally at the B3LYP/6-31 G(d) level of theory. Formally, two pathways can be considered: the reaction may either ... -
Synthesis and structure of cyclopropano-annelated homosesquinorbornene derivatives containing pyramidalized double bonds: Evidence for the sterical effect of a cyclopropyl. group on the degree of C=C double-bond pyramidalization
Saraçoğlu, Nurullah; Talaz, Oktay; Azizoğlu, Akın; Balcı, Metin; Watson, Winsor H. (Amer Chemical Soc,, 2005)endo- and exo-2,3,4,7-tetrahydro-1H-1,4-methanobenzoeyeloheptene-7-carboxylic acid ethyl esters have been synthesized, and their Diels-Alder cycloaddition reactions with maleic anhydride, dimethyl acetylenedicarboxylate ... -
Trapping of 1,2-benzo-1,3,4-cycloheptatriene as evidence for a strained cyclic allene structure
Yıldız, Yaşar Kemal; Öztürk, Turan; Balcı, Metin (Pergamon-Elsevier Science Ltd, 1999)8-brom-6,7-dihydrobenzocycloheptene 16 and 9-bromo-6,7-benzocycloheptadiene 17 have been synthesized via a new and simple method, and their allene reactions were studied. Treatment of 16 with a base in the presence of DPIBF ...
