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.
A catalyst system of Rh 2 (oct) 4 /DIPEA or TMU allows for the rapid construction of α-alkoxyketones from the corresponding α-diazo ketone and alcohol. This methodology was applied to the synthesis of immunoregulant 1.
The asymmetric synthesis of L-743,726 was achieved in six steps with an overall yield of 31%. The asymmetry was introduced using a lithiated ephedrine to mediate acetylide addition to a trifluoromethyl ketone with an enantiomeric excess of 96–98%.