|Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2011: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
We achieved an easy-to-use protocol for the synthesis of substituted o,o,o,o-tetraphenylenes: two triynes with phenylene-bridged 1,5-diyne moiety was homo-coupled by consecutive inter- and intramolecular [2+2+2] cycloadditions, and tetraphenylenes were obtained with good to excellent enantiomeric excess. We further examined meta-phenylene tethered triynes and achieved the first construction of o,m,o,m-tetraphenylenes in cis-form. In addition to the tetraphenylenes as dimers, o,m,o,m,o,m-hexaphenylenes were also obtained as trimers. In the reaction of para-phenylene tethered triynes, o,p,o,p,o,p-hexaphenylenes were major products along with the formation of o,p,o,p,o,p,o,p-octaphenylenes as tetramers.