Coupling ferrocene to brominated tetraazaporphyrin: exploring an alternative synthetic pathway for preparation of ferrocene-containing tetraazaporphyrins

Victor N. NEMYKIN; Elena A. MAKAROVA; Nathan R. ERICKSON; Pavlo V. SOLNTSEV

Makale detayları

Coupling ferrocene to brominated tetraazaporphyrin: exploring an alternative synthetic pathway for preparation of ferrocene-containing tetraazaporphyrins

Yazarlar:

Victor N. NEMYKIN | Elena A. MAKAROVA | Nathan R. ERICKSON | Pavlo V. SOLNTSEV

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2014 Vol.38 Issue 6, pp.1027-1045

Belge Tipi:

Makale

Yayın Tarihi:

5/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000727016

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

A Castro--Stephens coupling reaction between metal-free 3(2),8(7)-dibromo- 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and (ferrocenylethynyl)copper   resulted in the formation of copper 2(3),7(8),12(13), 17(18)-tetra-tert-butyl-3(2),  8(7)-di(ferrocenylethynyl)-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-3(2)-ferrocenylethynyl-5,  10,15,20-tetraazaporphyrin, which were separated in the form of 2 positional isomers along with copper 3(2)-bromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin. A similar reaction with metal-free 3(2),8(7),13(12), 18(17)-tetrabromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in only a trace amount of 3(2),8(7),13(12)-tribromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-18(17)  -ferrocenylethynyl-5,10,15,20-tetraazaporphyrin, while no products with larger number of organometallic substituents were observed. Direct coupling between ferrocenelithium and 3(2),8(7)-dibromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in a debromination reaction accompanied by very minor dimerization of the tetraazaporphyrin core, which was explained based on the steric properties of the parent tetraazaporphyrin. The target compounds were characterized using APCI mass spectrometry, UV-vis, and MCD spectroscopy, while the electronic structure of ferrocenylethyl-containing products was predicted by DFT approach. X-ray structures of individual positional isomers of copper 2-bromo-3,7,12,18-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and 3, 7, 12,18-tetrabromo-2,8,13,17-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin were also discussed.

 

A Castro--Stephens coupling reaction between metal-free 3(2),8(7)-dibromo- 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and (ferrocenylethynyl)copper   resulted in the formation of copper 2(3),7(8),12(13), 17(18)-tetra-tert-butyl-3(2),  8(7)-di(ferrocenylethynyl)-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-3(2)-ferrocenylethynyl-5,  10,15,20-tetraazaporphyrin, which were separated in the form of 2 positional isomers along with copper 3(2)-bromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and copper 2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin. A similar reaction with metal-free 3(2),8(7),13(12), 18(17)-tetrabromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in only a trace amount of 3(2),8(7),13(12)-tribromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-18(17)  -ferrocenylethynyl-5,10,15,20-tetraazaporphyrin, while no products with larger number of organometallic substituents were observed. Direct coupling between ferrocenelithium and 3(2),8(7)-dibromo-2(3),7(8),12(13),17(18)-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin resulted in a debromination reaction accompanied by very minor dimerization of the tetraazaporphyrin core, which was explained based on the steric properties of the parent tetraazaporphyrin. The target compounds were characterized using APCI mass spectrometry, UV-vis, and MCD spectroscopy, while the electronic structure of ferrocenylethyl-containing products was predicted by DFT approach. X-ray structures of individual positional isomers of copper 2-bromo-3,7,12,18-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin and 3, 7, 12,18-tetrabromo-2,8,13,17-tetra-tert-butyl-5,10,15,20-tetraazaporphyrin were also discussed.

Makale detayları

Coupling ferrocene to brominated tetraazaporphyrin: exploring an alternative synthetic pathway for preparation of ferrocene-containing tetraazaporphyrins

Yazarlar: Victor N. NEMYKIN | Elena A. MAKAROVA | Nathan R. ERICKSON | Pavlo V. SOLNTSEV

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2014 Vol.38 Issue 6, pp.1027-1045

Belge Tipi: Makale

Yayın Tarihi: 5/2014

Belge Dili: Türkçe

Document ID (Org No.): 2000727016

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Victor N. NEMYKIN | Elena A. MAKAROVA | Nathan R. ERICKSON | Pavlo V. SOLNTSEV

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2014 Vol.38 Issue 6, pp.1027-1045

Belge Tipi:

Makale

Yayın Tarihi:

5/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000727016

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527