Crystalline protein assemblies of polyhedra crystal (PhC) can be utilized as solid enzyme containers for long-term storage of enzymes with retention of their enzymatic activity. The enzymes can be released from the crystals at the optimum pH for the enzymatic activity by dissolution of the crystals using in vivo crystal engineering.
Styrene derivatives reacted with diphenyl(trifluoromethanesulfonyloxy)sulfonium trifluoromethanesulfonate (1) at low temperature to afford 2-arylethenyl(diphenyl)sulfonium triflates (2). Treatment of 2 with primary amines gave the corresponding 2-arylaziridines in high yields. One-pot synthesis of various aziridines was also successfully carried out without isolation of the intermediate 2.
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