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Beilstein J. Org. Chem. 2015, 11, 363–372, doi:10.3762/bjoc.11.42
Graphical Abstract
Scheme 1: From indigo to heteroindigo derivatives and all-carbon-indigo.
Scheme 2: Attempts to prepare the α-methylene ketones 12 and 13.
Figure 1: a) Both independent molecules of compound 13 in the crystal; ellipsoids represent 50% probability l...
Scheme 3: Dimerization of 13 under McMurry conditions.
Figure 2: a) The molecule of compound 17 in the crystal; ellipsoids represent 50% probability levels. Only th...
Scheme 4: Dimerization of indan-1-one (18) by a stepwise approach.
Scheme 5: Methylenation of 19 and bisalkylation of the product 23 with 1,2-dibromoethane.
Figure 3: The molecule of compound 23 in the crystal. Ellipsoids represent 50% probability levels. Only the a...
Figure 4: a) The molecule of compound 24 in the crystal. Ellipsoids represent 50% probability levels. Only th...
Figure 5: One of the two independent molecules of compound 25 in the crystal. Ellipsoids represent 50% probab...
Scheme 6: Cross-conjugated hydrocarbons by Thiele condensation.
Figure 6: a) The molecule of compound 30 in the crystal. Ellipsoids represent 50% probability levels. Only th...