Scientists at the Massachusetts Institute of Technology are working on a thermal diode that can turn heat into electric current. This could harness heat from a car engine, providing power for the electronics, or recharge laptop batteries by recycling a computer's micro-processor thermal output.
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Enantiopure 2-azetidinone-tethered alkynylaldehydes 1 react stereoselectively under mild conditions with N-methylhydroxylamine to yield products derived from either intramolecular reverse-Cope elimination or 1,3-dipolar cycloaddition, depending on both the length of the tether and the experimental conditions.