TY - GEN
T1 - Synthetic investigation for spiro-junctioned biradical compounds
AU - Ichihashi, Kana
AU - Okamura, Masaki
AU - Kanetomo, Takuya
AU - Ishida, Takayuki
N1 - Funding Information:
This work was supported with KAKENHI from JSPS (Grant Numbers 15H03793 and 15J11497).
Publisher Copyright:
© 2019 Author(s).
PY - 2019/1/24
Y1 - 2019/1/24
N2 - Biradical compounds are expected as promising building blocks for molecular magnetic materials, especially when they have a ground triplet state. We focused on spiro-junctioned D2d biradicals, 9,9'(10H,10H')-spirobiacridine-10,10'-dioxyls. tert-Butylation would suppress intermolecular interaction and facilitate analysis on the intramolecular exchange coupling. During attempted preparation of a precursory diamine 2,2',7,7'-tetra-tert-butyl-9,9'(10H,10'H)-spirobiacridine, 2,7-di-tert-butyl-9-{3-tert-butyl-6-(4-tert-butylphenylamino)phenyl}acridine was isolated as an isomeric byproduct and characterized by means of spectroscopic methods including 2D NMR. Fast aromatization is assumed to occur before intramolecular Friedel-Crafts cyclization.
AB - Biradical compounds are expected as promising building blocks for molecular magnetic materials, especially when they have a ground triplet state. We focused on spiro-junctioned D2d biradicals, 9,9'(10H,10H')-spirobiacridine-10,10'-dioxyls. tert-Butylation would suppress intermolecular interaction and facilitate analysis on the intramolecular exchange coupling. During attempted preparation of a precursory diamine 2,2',7,7'-tetra-tert-butyl-9,9'(10H,10'H)-spirobiacridine, 2,7-di-tert-butyl-9-{3-tert-butyl-6-(4-tert-butylphenylamino)phenyl}acridine was isolated as an isomeric byproduct and characterized by means of spectroscopic methods including 2D NMR. Fast aromatization is assumed to occur before intramolecular Friedel-Crafts cyclization.
UR - http://www.scopus.com/inward/record.url?scp=85061140760&partnerID=8YFLogxK
U2 - 10.1063/1.5089444
DO - 10.1063/1.5089444
M3 - Conference contribution
AN - SCOPUS:85061140760
T3 - AIP Conference Proceedings
BT - Irago Conference 2018
A2 - Sandhu, Adarsh
A2 - Taki, Masumi
A2 - Kishimoto, Tetsuo
A2 - Sharma, Jaiyam
PB - American Institute of Physics Inc.
T2 - 8th Irago Conference 2018: A 360-Degree Outlook on Critical Scientific and Technological Challenges for a Sustainable Society
Y2 - 1 November 2018
ER -