Process for the manufacture of epoxybutanol intermediates

Details Process for the manufacture of epoxybutanol intermediates Process for the manufacture of epoxybutanol intermediates

2006-11-29

2010-10-19

Saeed, Kamal A (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S262200, C549S540000, C549S559000, C549S560000

Reexamination Certificate

active

07816537

ABSTRACT:
Disclosed is a process for the manufacture of a compound of formula (I)whereinHal represents fluoro or chloro, and R1and R2represent, independently from one another, hydrogen or Hal; in which process a compound of formula (II)is converted to a corresponding alkyl, fluoroalkyl or aryl sulfonic acid ester, which is then reacted with an alkali metal nitrite in the presence of a suitable crown ether in a polar non-nucleophilic solvent at a temperature of −10 to 50° C. to give the compound of formula (I).

REFERENCES:
patent: 1083175 (2001-03-01), None
patent: 1535914 (2005-06-01), None
patent: WO 99/45008 (1999-09-01), None
patent: WO 99/52840 (1999-10-01), None
International Search Report and Written Opinion dated Sep. 11, 2007.

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