1.1
Reagents:
Triisopropyl borate
,
Piperidine, 2,2,6,6-tetramethyl-, lithium salt (1:1)
;
2 min, -78 °C; 5 min, -78 °C
1.2
Solvents:
Tetrahydrofuran
;
5 min, -78 °C; overnight, 0 °C → rt
1.3
Reagents:
Acetic acid
1.4
1 h, rt
1.5
Reagents:
Monopotassium phosphate
Solvents:
Water

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