Substituent Effect on the Chlorination of 2-Alkoxypyridines to give 2-Chloropyridines under Vilsmeier-Haack Conditions

~86%

~90%

~89%

~51%

~48%

~54%

~60%

~67%

~71%

~40%

~52%

~45%

~41%

~66%

~69%

~58%

~51%

~30%

~30%

~28%