Enhancing the helical distortion in pyrrolo[1,2-a]phenanthrolines
摘要:
Nine new helical compounds were synthesized using a one-pot reaction between phenanthrolinium N-ylides and quinones as cyclic olefinic dipolarophiles. 1,4-naphthoquinone, 1,4-benzoquinone and 1,2-naphthoquinone were used as dipolarophiles, resulting in excellent to moderate yields. The structure of the compounds was deduced using NMR spectroscopy and the helical distortion was ascertained using X-ray analysis.
Eleven new 1,10-phenanthroline derivatives have been prepared by 3+2dipolar cycloaddition reactions of 1,10-phenanthrolinium-ylides 7–12 in situ generated from corresponded salts, with dimethyl acetylene-dicarboxylate and ethyl propiolate.