REACTIONS OF ORGANOALUMINUMS WITH COPPER(II) HALIDES. A CONVENIENT ROUTE TO ALKYL HALIDES PROM OLEFINS VIA HYDROALUMINATION
作者:Fumie Sato、Yoshikuni Mori、Masao Sato
DOI:10.1246/cl.1978.833
日期:1978.8.5
The reaction of lithium tetraalkylaluminums with copper(ll) chloride or bromide gives the corresponding alkyl halides in good yield. The facile reaction offers a convenient method for the preparation of 1-haloalkanes or 1-haloalkenes from 1-alkenes or nonconjugated diolefins, respectively.
Cyclic derivatives of alkyl dihydroxyalkylxanthenes
申请人:Hoechst Aktiengesellschaft
公开号:US04713455A1
公开(公告)日:1987-12-15
Compounds of the formula ##STR1## wherein one of the radicals R.sup.1, R.sup.2 or R.sup.3 denotes a straight-chain alkyl group having 4 to 8 C atoms and two vicinal hydroxyl groups in the .omega.,.omega.-1 or .omega.-1,.omega.-2 positions and the two other radicals represent straight-chain or branched alkyl groups having up to 12 C atoms in the position of R.sup.1 and R.sup.3 and up to 4 C atoms in the position of R.sup.2, the total of C atoms in these two alkyl substituents being a maximum of 14, are prepared by oxidation of the corresponding alkenylxanthines and by alkylation with compounds which introduce the dihydroxyalkyl radical or a precursor thereof. The dihydroxyalkyldialkylxanthines are suitable for the treatment of obstructive respiratory tract diseases.
Compounds of the formula ##STR1## wherein one of the radicals R.sup.1, R.sup.2 or R.sup.3 denotes a straight-chain alkyl group having 4 to 8 C atoms and two vicinal hydroxyl groups in the .omega.,.omega.-1 or .omega.-1,.omega.-2 positions and the two other radicals represent straight-chain or branched alkyl groups having up to 12 C atoms in the position of R.sup.1 and R.sup.3 and up to 4 C atoms in the position of R.sup.2, the total of C atoms in these two alkyl substituents being a maximum of 14, are prepared by oxidation of the corresponding alkenylxanthines and by alkylation with compounds which introduce the dihydroxyalkyl radical or a precursor thereof. The dihydroxyalkyldialkylxanthines are suitable for the treatment of obstructive respiratory tract diseases.
Reactions of dicyclopropyl compounds with di-µ-chloro-dichlorobis(ethylene)dipalladium
作者:A. D. Ketley、J. A. Braatz、Judith Craig
DOI:10.1039/c29700001117
日期:——
The reactions of dicyclopropyl and dicyclopropylmethane with di-µ-chloro-dichlorobis(ethylene)dipalladium result in rapid ring opening and formation of chloro-substituted π-allylpalladium complexes.