Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A process for the preparation of a compound of the general formula (10): wherein R 2 is H, OH, alkoxy, substituted alkoxy, or acyloxy; and R 3 and R 4 are each H or alkyl; characterised in that a Δ(1)-3-keto gibberellin of the general formula (11): wherein R 2 , R 3 and R 4 are as hereinbefore defined or a 3-keto gibberellin of the general formula (13): wherein R 2 , R and R 4 are as hereinbefore defined or a mixture of 3-keto gibberellins of the general formulae (11) and (13) is reacted with a compound of the general formula (12): wherein M + represents a monovalent cation and R 6 represents an alkyl group,in the presence also of a proton source where a compound of formula (11) is to be converted into a compound of formula (10).
Claim 2
Dependent Claim
140 words
A process for the preparation of a compound of the general formula (10): wherein R 2 is H, OH, alkoxy, substituted alkoxy, or acyloxy; and R 3 and R 4 are each H or alkyl; characterised in that a Δ(1)-3-keto gibberellin of the general formula (11): wherein R 2 , R 3 and R 4 are as hereinbefore defined or a 3-keto gibberellin of the general formula (13): wherein R 2 , R and R 4 are as hereinbefore defined or a mixture of 3-keto gibberellins of the general formulae (11) and (13) is reacted with a compound of the general formula (12): wherein M + represents a monovalent cation and R 6 represents an alkyl group,in the presence also of a proton source where a compound of formula (11) is to be converted into a compound of formula (10).
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 wherein the compound of general formula (12) is lithium tri-sec-butylborohydride, potassium tri-sec-butylborohydride or potassium triethylborohydride.
Claim 4
Dependent Claim
43 words
A process as claimed in claim 1 for the preparation of a compound of the general formula (lOa): wherein the radicals R 2 R and R are as defined in claim 1, wherein the compound of general formula (12) used is potassium tri-sec-butylborohydride.
Claim 5
Dependent Claim
22 words
A process as claimed in any of claims 1 to 3 wherein the proton source is an alkanol or a hydrogenphosphate salt.
Claim 6
Dependent Claim
19 words
A process as claimed in claim 4 wherein the hydrogenphosphate salt is potassium dihydrogenphosphate, sodium dihydrogenphosphate or dipotassium hydrogenphosphate.
Claim 7
Dependent Claim
37 words
A process as claimed in any of claims 1 to 5 wherein the radicals R 3 and R 4 are each H, methyl or ethyl; and wherein R 2 is H, OH, methoxy, methoxymethoxy, acetoxy, or dichloroacetoxy.
Claim 8
Dependent Claim
20 words
A process as claimed in claim 6 wherein the radicals R 2 , R and R 4 all represent H.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 6 wherein the radicals R 3 and R 4 both represent H and the radical R 2 represents OH.