Creation of Small Molecules Activatioin Reactions by Utilization of Heavier Group 14 Elements

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03777
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Organic chemistry
• Research Institution: Nagoya City University (2016-2017); Kyoto University (2015)
• Principal Investigator: Sasamori Takahiro 名古屋市立大学, 大学院システム自然科学研究科, 教授 (70362390)
• Co-Investigator(Renkei-kenkyūsha): TOKITOH Norihiro 京都大学, 化学研究所, 教授 (90197864)
• Research Collaborator: NAGASE Shigeru ; Guo Jing-Dong ; SUGAHARA Tomohiro
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 典型元素 / 小分子活性化 / ゲルマニウム / ジゲルミン / エチレン / アセチレン / ジゲルミン

Outline of Final Research Achievements

The catalytic activation of neutral small molecules followed by the formation of C-C bonds is a highly important method to increase the complexity and value of simple starting materials. Traditionally, transition-metal catalysts have been used for this purpose. However, similar C-C coupling reactions of neutral small organic molecules in the absence of a transition-metal catalyst remain largely unknown, although such “transition-metal-free” catalytic systems would be highly desirable in order to avoid the use of precious metals.
We have succeeded in the isolation of a compound with a Ge-Ge triple bond, and showed its high susceptibility to [2+2+2]cycloadditions in the presence of two molecules of an acetylene to afford the corresponding 1,2-digermabenzene. We also found that an isolable digermyne can act as a precatalyst for the cyclotrimerization of arylacetylenes to afford the corresponding 1,2,4-triarylbenzenes with absolute selectivity.

Free Research Field

有機元素化学、有機金属化学