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The ability to propagate embryonic stem cells (ESCs) while maintaining their pluripotency is critical if their potential use in regenerative medicine is to be realized. The mechanisms controlling ESC self-renewal are under intense investigation, and glycogen synthase kinase 3 (GSK-3) has been implicated in regulating both self-renewal and differentiation. To clarify its role in ESCs we have used chemical...
The photolysis of N-MEM-pyridinium chloride (1e) in alkaline H2O gave N-MEM-6-azabicyclo[3.1.0]hexenol (2e). With benzoic acid in CHCl3, this bridged aziridine gave a complex aminal 7 reminiscent by its C2 symmetry of Tröger's base. Photolysis of α-d-glucopyranosyl pyridinium chloride (α-12) gave a 1:1 mixture of the corresponding α-d-glucopyranosyl aziridines (α-13/α-14), which were separated, after...
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