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. 2022 Mar 18;13:1468. doi: 10.1038/s41467-022-28879-4

Fig. 1. Syntheses of di-ortho-phthalaldehyde (DOPA) cross-linkers.

Fig. 1

Reagents and conditions: a Me2Zn, RhCl(PPh3)3, THF, 24 h, 76%. b DIBAL-H, THF, 12 h. c DMP, DCM, 12 h, 98% for two steps. d Cs2CO3, bis(2-iodoethyl) ether or 1,2-dibromoethane, ACN, 80 °C, 12 h, n = 2, 77%; n = 1, 37%. e DIBAL-H, THF, 12 h. f DMP, DCM, 12 h, n = 2, 93% for two steps; n = 1, 80% for two steps. DIBAL-H = diisobutylaluminum hydride, DMP = Dess-Martin periodinane.