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Synthesis of Ca2+‐dependent photocaged coumarin 7 and permeable derivative 8. a) DIAD, PPh3, THF, 80 %. b) TBAF, THF, 95 %. c) DIAD, PPh3, THF, 71 %. d) TFA, CH2Cl2, 84 %. e) BrCH2OAc, DIEA, DMF, 51 %. DIAD=diisopropyl azodicarboxylate; TBAF=tetrabutylammonium fluoride; TFA=trifluoroacetic acid; DIEA=N,N‐diisopropylethylamine; TBS=tert‐butyldimethylsilyl.
