Isatogens. Part VI. Synthesis of isatogens via tolan (diphenylacetylene) intermediates
作者:C. C. Bond、M. Hooper
DOI:10.1039/j39690002453
日期:——
A number of substituted 2-nitrotolans and isatogens have been prepared in high yield from copper(I) 2-nitrophenylacetylide and substituted aromatic iodo-compounds. The reaction has been shown to be affected by both electronic and steric factors and its limitations are discussed. 2-Carbamoyltolans have been shown to cyclise to aminoindenones. A number of novel compounds have been isolated from these
hexadehydro-Diels–Alder (HDDA) cycloisomerization reaction to produce reactive benzyne derivatives can be initiated photochemically. As with the thermal variant of the HDDA process, the reactive intermediates are formed in the absence of reagents or the resulting byproducts required for the generation of benzynes by traditional methods. This photo-HDDA (or hν-HDDA) reaction occurs at much lower temperatures (including