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1 article(s) from Viehmann, Philipp

Design and synthesis of a photoswitchable guanidine catalyst

Philipp Viehmann and
Stefan Hecht

Beilstein J. Org. Chem. 2012, 8, 1825–1830, doi:10.3762/bjoc.8.209

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Scheme 1: Ring-opening polymerization (ROP) of lactide with TBD or the acyclic guanidine 1 as catalysts [16,18].

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Scheme 2: Illustration of a photoswitchable guanidine catalyst for the ROP of lactide and the corresponding t...

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Scheme 3: Synthesis of guanidine 2_E.

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Figure 1: ORTEP image of the single-crystal X-ray structure of guanidine 2_E, as well as a rotated close-up of...

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Figure 2: UV–vis spectra of guanidine 2 in acetonitrile, c = 3.9·10⁻⁵ mol/L. (a) E→Z isomerization with irrad...

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Scheme 4: Guanidine 11 as a catalyst in the ROP of rac-lactide (catalyst/initiator/monomer ratio = 10:1:100).

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Figure 3: Supposed intermediates resulting from either a cyclohexane-substituted guanidine (a) [18] or an aromati...

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Published 24 Oct 2012

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