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. 2023 Jul 21;9(8):1575–1580. doi: 10.1021/acscentsci.3c00725

Figure 2.

Figure 2

(A) Synthesis of alkynyl phosphonates 1a–j. (B) Synthesis of ethynyl phosphonate 2, yield based on reducible phosphate (1 per Na4P2O7, 2 per Na5P3O10). (C) Synthesis of 2a, 2b, and 3 from 2.