In a crystal, yet as in solution: Bulky reagents are sufficiently mobile in the pores of a porous network complex to react with imbedded substrates in a single-crystal-to-single-crystal fashion. Acylation and ureidation of amines and Schiff-base formation from aldehydes occur efficiently. The pore of the complex thus serves as a crystalline molecular flask, where reaction products are simply determined by X-ray crystallographic analysis.
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Kawamichi et al. (2008) studied this question.
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