|Budget Amount *help
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
|Outline of Final Research Achievements
The development of a practical and efficient method for construction of heterocycles is an essential part of programs to explore new medical and agrochemical agents. 1,3-Dipoles are important chemical species containing heteroatoms. We studied on innovative syntheses heterocycles utilizing 1,3-dipoles based on three strategies.
We designed a novel chiral reaction system possessing multi-metal centers utilizing tartaric acid ester as a chiral auxiliary. Based on this concept, we developed asymmetric 1,3-dipolar cycloadditions of azomethine imines to allylic alcohols. A strategy consisted of a stepwise addition to 1,3-dipoles, followed by cyclizaion was found to be an alternative and regiocontrolled pathway to synthesize of heterocycles. An asymmetric addition of acetylides to nitrones followed by cyclization was developed to give the corresponding optically active 4-isoxazolines. A novel [5+1] cycloaddition reaction of N’-acyl azomethine imines with isocyanides was also explored.