Photochemical generation of oxa-dibenzocyclooctyne (ODIBO) for metal-free click ligations
作者:Christopher D. McNitt、Vladimir V. Popik
DOI:10.1039/c2ob26581h
日期:——
Oxa-dibenzocyclooctynes (ODIBO, 2a–c) are prepared by photochemical decarbonylation of corresponding cyclopropenones (photo-ODIBO, 1a–c). While photo-ODIBO does not react with azides, ODIBO is one of the most reactive cyclooctynes exhibiting rates of cycloaddition over 45 M−1 s−1 in aqueous solutions. ODIBO is stable under ambient conditions and has low reactivity towards thiols. Photo-ODIBO survives heating up to 160 °C and does not react with thiols.