Table 1.
Grignard reagents at −40 °C. Other nucleophiles at 23 °C.
Isolated yield of single diastereomer.
93% Deuterium incorporation at C19.
Isolated as C19 iminium triflate. 2-ClPyr = 2-chloropyridine.
Grignard reagents at −40 °C. Other nucleophiles at 23 °C.
Isolated yield of single diastereomer.
93% Deuterium incorporation at C19.
Isolated as C19 iminium triflate. 2-ClPyr = 2-chloropyridine.