A process for the manufacture of Sevoflurane CF
3
—CH(OCH
2
F)—CF
3
which comprises (a) manufacturing a substituted malonic acid derivative of formula (I): R
1
OOC—CH(OCH
2
X)—COOR
2
or of formula (II): R
3
HNOC—CH(OCH
2
X)—CONHR
4
, wherein X is OH or a leaving group which can be substituted by nucleophilic substitution and wherein R
1
, R
2
R
3
, R
4
, equal to or different from each other, are independently selected from the group consisting of H, an alkyl group having from 1 to 10 carbon atoms which is optionally substituted by at least one halogen atom, an aralkyl group, and an aryl group; and (b) further reacting said malonic acid derivative as intermediate for the manufacture of Sevoflurane CF
3
—CH(OCH
2
F)—CF
3
.
一种制造Sevoflurane
CF3-CH(OCH2F)- 的过程,包括(a)制造公式(I)的取代
马来酸衍
生物:R1OOC-CH(OCH2X)-COOR2或公式(II):R3HNOC-CH(OCH2X)-CONHR4,其中X为OH或可被亲核取代的离去基团,其中R1,R2R3,R4,相同或不同,独立地选自H,具有1至10个碳原子的烷基,该烷基可被至少一个卤素原子取代,芳基烷基和芳基;并且(b)进一步反应所述
马来酸衍
生物作为Sevoflurane -CH(OCH2F)- 的制造中间体。