example 2 describes a 1pot rnx  

Patent US5003091

, 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.

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"Whatever there is to learn has to be learned the hard way."
Castaneda's teacher Don Juan Matus

That is again a nice one, 3base!

3base, this is absolutely fucking awesome patent, i think it should bee added to Rh's site at once.

Congratulations on a good find, really cool!

Antoncho

uemura & Antoncho: thank you guys, it is a special honor for
me to be lauded by such highly respected elder bees  

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"Whatever there is to learn has to be learned the hard way."
Castaneda's teacher Don Juan Matus