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. 2021 May 31;12:3257. doi: 10.1038/s41467-021-23504-2

Fig. 5. Synthesis of gem-difluorinated analogs of drugs and further valorization of gem-difluorinated allyl ethers.

Fig. 5

a Transition-metal catalyzed carbonylation of difluorinated alkene 3. b Dihydroxylation of 16 and 23 to give difluorinated 1-aryl-glycerols. c Ruthenium-catalyzed [2 + 2 + 2] co-cyclization of diene-yne 26. d Rhodium-catalyzed reductive cyclization of 1,6-enyne 25. e Practical procedures for the synthesis of OCF2-Aripiprazole 70. f Four-step protocol for the synthesis of OCF2-Pramocaine 73.