Synthesis of cis-diols from aryl silanes
View Patent ↗The present invention is related to cis-diols and biological methods of producing cis-diols. The present invention further relates to processes for subsequently converting such silane cis-diols to the more stable acetonide derivatives, as well as a process for converting silane cis-diols to the corresponding catechols and the compounds produced thereby. The present invention also provides chemical methods for the conversion of said silane cis-diols and acetonide compounds to epoxy, saturated and otherwise modified derivatives. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that is will not be used to interpret or limit the scope or meaning of the claims 37 CFR 1.72(b).
1. A compound comprising a cis-diol having the formula:
wherein:
R 1 , R 2 , and R 3 are each independently selected from hydrogen, a halogen, aryl, a linear or branched C 1 –C 18 alkyl, a linear or branched C 2 –C 18 alkenyl, a linear or branched C 2 –C 18 alkynyl, halomethyl, OR, SR, NR 2-3 , or O(CO)R;
R 4 is selected from hydrogen, a halogen, linear or branched C 1 –C 18 alkyl, linear or branched C 2 –C 18 alkenyl, linear or branched C 2 –C 18 alkynyl, halomethyl, CF 3 , CN, NO 2 , SR, OR, NR 2-3 , O(CO)R, SiR 1 R 2 R 3 , or a bridging group between two arene or substituted arene moieties;
n is 0–3;
R is hydrogen, linear or branched C 1 –C 18 alkyl, or SiR 1 R 2 R 3 ;
X is a divalent linear or branched C 1 –C 18 alkyl, C 2 –C 18 alkenyl, or C 2 –C 18 alkynyl spacer, except when X=C 2 alkynyl and R 1 =R 2 =R 3 then R 1 =R 2 =R 3 cannot be —CH 3 .
2. The compound as claimed in claim 1 wherein:
R 1 , R 2 , and R 3 are each independently selected from hydrogen, a linear or branched C 1 –C 5 alkyl, a linear or branched C 2 –C 5 alkenyl, a linear or branched C 2 –C 5 alkynyl, halomethyl, or OR;
R 4 selected from hydrogen, halogen, a linear or branched C 1 –C 5 alkyl, a linear or branched C 2 –C 5 alkenyl, a linear or branched C 2 –C 5 alkynyl, CN, NO 2 , OR or SiR 1 R 2 R 3 ;
R is hydrogen, methyl, or ethyl; and
X is either a divalent linear or branched C 1 –C 5 alkyl, C 2 –C 5 alkenyl, or C 2 –C 5 alkynyl spacer.
3. The compound as claimed in claim 1 wherein:
R 1 , R 2 , and R 3 are each independently selected from hydrogen, methyl, chloromethyl, or vinyl;
R 4 selected from hydrogen, halogen, a linear or branched C 1 –C 3 alkyl, a linear or branched C 2 –C 3 alkenyl, a linear or branched C 2 –C 3 alkynyl, CN, NO 2 , OR or SiR 1 R 2 R 3 .
4. The compound as claimed in claim 1 wherein said cis-diol comprises