Author： Hong Bor Hallur Mahanandeesha Liao Ju
Publisher： Taylor & Francis Ltd
ISSN： 0039-7911
Source： Synthetic Communications, Vol.36, Iss.11, 2006-06, pp. : 1521-1528
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Abstract
A highly regio- and stereoselective hetero Diels–Alder cycloaddition of indene with N-sulfonyl-1-aza-1,3-butadiene was achieved. Subsequent transformation of the 5 H -indeno [l,2- b ]pyridine via elimination and reduction provides a new route to azafluorenone (e.g., 1-methyl-4-azafluorene) for the synthesis of onychnine.
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