1.1
Reagents:
Piperidine, 2,2,6,6-tetramethyl-, lithium salt (1:1)
Solvents:
Tetrahydrofuran
;
0.5 h, -80 °C
1.2
Reagents:
Triisopropyl borate
;
0.5 h, -80 °C; -80 °C → rt
1.3
Reagents:
Hydrochloric acid
Solvents:
Water
;
pH 6, rt