Skeletal Migrations Observed during the Cob(I)alamin-Catalyzed Reduction of 4?-(tert-Butyl)-1?-(1-methylvinyl)cyclohexanecarbaldehyde
作者:Carl B. Ziegler、Albert Fischli
DOI:10.1002/hlca.19850680122
日期:1985.2.13
During the cob(I)alamin(1(I))-catalyzed reduction of 3, intermediate formation of 2 and final generation of 4–10 was observed (see Scheme 1, cf. Tables 1 and 2). Identical products in similar ratios were generated starting from either 2 or 3. Accepting the intermediate formation of six interconnected cobalt complexes, i.e.A–F(cf. Scheme 2), the generation of all the products observed can be explained
Protolytic Opening of Two Diastereoisomeric Cyclopropanols
作者:Peter Schönholzer、Terence S. Wan、Albert Fischli
DOI:10.1002/hlca.19840670307
日期:1984.5.2
Cob(I) alamin (1(I))-catalyzed reduction of the aldehyde 2 led to the two crystalline cyclopropanols 3 and 4 (see Scheme 2). The protolytic ring-opening starting from 3 produced the saturated aldehydes 6 and 7;8 was formed in traces only (see Scheme 3). The protolysis starting from 3 led, therefore, mainly to retention of configuration at the spiro C-atom (7); ring-opening with inversion was observed