The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Ti(II)-mediated cyclization of readily accessible optically active secondary 2,7- and 2,8-enyn-1-ol derivatives enables the selective preparation of any one of the four possible stereoisomers of the cyclized product with high optical purity.
The reaction of chiral allenyltitaniums, generated from optically active secondary propargyl phosphates and a Ti(O-i-Pr) 4 /2 i-PrMgCl reagent, with trialkylstannyl chloride proceeded with a high chirality transfer of more than 93% to afford optically active secondary propargylstannanes in excellent yield, and which, in turn, were converted to optically active (Z)-allylstannanes by reaction...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.