groups alcohols with 1 to 4 carbon atoms are preferred examples of these include methanol ethanol n propanol iso propanol n butanol iso butanol sec butanol tert butanol n pentanol iso pentanol neo pentanol or hexanol in some cases the abbreviations meoh etoh n proh i proh n buoh i buoh t buoh etc are used for the above mentioned molecules unless otherwise stated the definitions propanol butanol pentanol and hexanol include all the possible isomeric forms of the groups in question thus for example propanol also includes n propanol and iso propanol while butanol includes iso butanol sec butanol and tert butanol etc the compounds of formula i and ii may optionally be converted into the acid addition salts thereof with an inorganic or organic acid suitable acids include for example succinic acid hydrobromic acid acetic acid fumaric acid maleic acid methanesulphonic acid lactic acid oxalic acid phosphoric acid hydrochloric acid sulphuric acid tartaric acid or citric acid it is also possible to use mixtures of the above mentioned acids the process according to the invention will now be illustrated by means of the examples that follow the skilled man will be aware that the examples serve only as an illustration and are not to be regarded as restrictive a 3 l glass apparatus is flushed with argon and filled with 2 l of methanol the methanol is refluxed for 1 hours while argon is piped through after cooling to 20 25 u00b0 c 7 2 g of di chloro bis cycloocta 1.