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Beilstein J. Org. Chem. 2012, 8, 693–698, doi:10.3762/bjoc.8.77
Graphical Abstract
Scheme 1: Preparation of carbene adducts 4 [18] and 5.
Scheme 2: Preparation of the cycloheptatrienes 7 and 8 [18,20].
Scheme 3: Preparation of derivatives 9 and 10.
Beilstein J. Org. Chem. 2012, 8, 403–410, doi:10.3762/bjoc.8.44
Figure 1: Overall molecular structure of the perhydroazulene core with trans-stereochemistry.
Scheme 1: Stereochemistry of carbene adducts 1a and 1b.
Scheme 2: Preparation of the tropylidenes 4a and 4b.
Scheme 3: Formation of esters 5a and 5b and the corresponding acids 6a and 6b.
Scheme 4: Preparation of 8a and 8b.
Scheme 5: Preparation of 10a and 10b.