Álvarez-García J, Rubio-Pisabarro V, Silva-López C, Cid MM. Photochemically Driven Tandem Process in the Construction of a Biscyclopropylcage from 2,5-Dimethoxy-
p-benzoquinone and Terminal Acetylenes.
Org Lett 2020;
22:4527-4531. [PMID:
32436710 DOI:
10.1021/acs.orglett.0c01554]
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Abstract
A photochemical two-step one-pot synthesis of novel biscyclopropyl-box-shaped compounds via the reaction of 2,5-dimethoxy-para-benzoquinone and monosubstituted alkynes is reported. The reaction mechanism for a process in which six new C-C bonds are formed is explored by means of experimental and computational techniques. The whole process occurs with complete selectivity, and only one densely decorated diastereomer is obtained; such a degree of control and substitution makes for a rather powerful and complexity-building process.
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