Synthesis of specifically O-alkylated anthraquinones by cycloaddition

~23%

~%

~97%

~%

~%

~%

~57%

~%

~92%

~%

~13%

~%

~71%

~%

~%

~0%

~%

~%

~%

~0%

~%

~60%

~%

~%

~%