example 2 describes a 1pot rnx 8)
Patent US5003091 (http://l2.espacenet.com/dips/viewer?PN=US5003091&CY=gb&LG=en&DB=EPD)
, 1991-03-26
CROCHEMORE MICHEL (FR) ; RHONE POULENC CHIMIE (FR)
3-Methoxy-4,5-methylenedioxybenzaldehyde is facilely and improvedly
prepared by reacting 4,5-dihydroxy-3-methoxybenzaldehyde with a
dihalomethane in a two-phase reaction medium and at a pH of from 7 to 12.
"Whatever there is to learn has to be learned the hard way."
Castaneda's teacher Don Juan Matus