Preparation of 1,3-di-halo-substituted benzene derivatives

Details Preparation of 1,3-di-halo-substituted benzene derivatives Preparation of 1,3-di-halo-substituted benzene derivatives

2006-07-18

2006-07-18

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S661000, C568S663000, C568S938000, C570S143000, C570S201000

Reexamination Certificate

active

07078571

ABSTRACT:
A process for preparing 1,3-di-halo-substituted benzene derivatives (II) from 2,6-di-halo-substituted benzaldehydes (I) (where X1, X2are each independently F, Cl, Br, and R1, R2, R3are each independently H, halogen, OH, C1–C12-alkyl, CF3, CHO, C6–C14-aryl, Oalkyl, Oaryl, NO2) by reacting with an alkaline medium, which comprises initially charging the alkaline medium and metering in the 2,6-di-halo-substituted benzaldehyde (I) or initially charging the 2,6-di-halo-substituted benzaldehyde (I) and metering in the alkaline medium

REFERENCES:
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patent: 6407029 (2002-06-01), Schiemenz et al.
patent: 0 598 338 (1994-05-01), None
patent: 1 070 724 (2001-01-01), None
English abstract for EP 0598338, May 25, 1994.
Lock, Chem. Bericht, 1936, 69, pp. 2253-2258.
English translation of G. Lock, “Uber die Abspalting der Aldehydgruppe als Amisensaure aus Aromatischen Aldehyden, III. Mitteil Gemischt-halogen-haltige und Halogen-nitrobenzaldehyde,” Barichte Der Deutschen Chamischen Gesellschaft, Bd. 68, pp. 1501-1511 (1935).
English translation of G. Lock, Zur Kenntnis der Cannizzaroschen Reaktion, “Monatahefte Der Chemie” Bd. 55, pp. 307-315 (1930).
English translation of G. Lock, “Uber einige Halogenderivate des Meta-oxy-benzaldehydes,” Monatshefte Der Chemie Bd. 67, pp. 320-327 (1936).
English translation of G. Lock, “Uber die Abspaltung der Aldehydgruppe Aus aromatischen aldehyden, I. Mitteil Polychlorbenzaldehyde,” Berichte der Deutschen Chemischen Gesellschaft, Bd. 66, pp. 1527-1531 (1933).
English translation of G. Lock, “Uber die Abspaltung der Aldehydgruppe als Ameisensaure aus aromatischen Aldehyden, IV. Mitteil: 2-chlor-6-fluor-und 2, 6-Difluor-benzaldehyd,” Berichte der Deutschen Chemischen Gesellschaft, Bd. 69, pp. 2253-2258 (1936).
EP Search Report for EP 03023176, mailed Feb. 4, 2004.
G. Lock, “Uber die Abspalting der Aldehydgruppe als Amisensaure aus Aromatischen Aldehyden, III. Mitteil Gemischt-halogen-haltige und Halogen-nitrobenzaldehyde,” Barichte Der Deutschen Chamischen Gesellschaft, Bd. 68, pp. 1501-1511 (1935).
G. Lock, Zur Kenntnis der Cannizzaroschen Reaktion, “Monatahefte Der Chemie” Bd. 55, pp. 307-315 (1930).
G. Lock, “Uber einige Halogenderivate des Meta-oxy-benzaldehydes,” Monatshefte Der Chemie Bd. 67, pp. 320-327 (1936).
G. Lock, “Uber die Abspaltung der Aldehydgruppe Aus aromatischen aldehyden, I. Mitteil Polychlorbenzaldehyde,” Berichte der Deutschen Chemischen Gesellschaft, Bd. 66, pp. 1527-1531 (1933).
G. Lock, “Uber die Abspaltung der Aldehydgruppe als Ameisensaure aus aromatischen Aldehyden, IV. Mitteil: 2-chlor-6-fluor-und 2, 6-Difluor-benzaldehyd,” Berichte der Deutschen Chemischen Gesellschaft, Bd. 69, pp. 2253-2258 (1936).

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