CO2 can be reduced to organic molecules, such as formic and acetic acids in a yield of approximately 67% with metal sulfides catalysts, using H2S as a reductant and with SxOy2− as oxidative products in a simulated hydrothermal vent system. These results are significant for understanding abiotic organic synthesis from dissolved CO2 in deep sea hydrothermal vents.

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A copper-catalyzed 1,4-addition reaction of arylsulfonyl iodides with 1,3-enynes afforded various allenyl halides in high yields under mild conditions via a radical mechanism.