发明授权
US5286824A Process for the preparation of halogenated
2,2-bis(trifluoromethyl)-1,3-dioxolanes
失效
卤代2,2-双（三氟甲基）-1,3-二氧戊环的制备方法
- 专利标题： Process for the preparation of halogenated 2,2-bis(trifluoromethyl)-1,3-dioxolanes
- 专利标题（中）： 卤代2,2-双（三氟甲基）-1,3-二氧戊环的制备方法
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申请号： US961985申请日： 1992-10-16
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公开(公告)号： US5286824A公开(公告)日： 1994-02-15
- 发明人: Leo E. Manzer , Paul R. Resnick
- 申请人： Leo E. Manzer , Paul R. Resnick
- 申请人地址： DE Wilmington
- 专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人地址： DE Wilmington
- 主分类号： C07D317/42
- IPC分类号： C07D317/42 ; C08F16/24
摘要：
A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1, 3-dioxolane of the formula ##STR1## wherein R.sub.f is perhaloalkyl comprising a 2,2-bis(trihaloalkyl)-1,3-dioxolane in the presence of at least one of La, Ni, Sn, Zn Fe, Co or Cu is disclosed.A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1,3-dioxolane of the formula ##STR2## wherein X is Cl and each Y is independently Cl or F and wherein at least one Y is F, comprising fluorinating a halogenated 2,2-bis(trifluoromethyl)-4,4,5,5-tetrachloro-1,3-dioxolane in the presence of a catalyst which is preferably Cr.sub.2 O.sub.3 is disclosed.A process for the production of a 2,2-bis(trihaloalkyl)-1,3-dioxole of the formula ##STR3## comprising dehalogenating substantially only a corresponding trans-2,2-bis(perhaloalkyl)-4,5-difluoro-4, 5-dichloro-1,3-dioxolane is disclosed.
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