Abstract: A method and system for authenticating a computing device for data usage accounting are described herein. As an example, the method can be practiced on a computing device that includes secure applications and unsecure applications. A data session request for a secure application can be received, and in response to the data session request, a data session connection can be initiated. As part of initiating the data session connection, an authentication package uniquely associated with the computing device can be sent to the authentication server. If the computing device is authenticated, the data session connection can be established to enable data exchange and data accounting in which the authenticating may be performed exclusively for the secure applications.

Abstract: An efficient arylation technique for use in the synthesis of erythromycin derivatives, involving a modified Heck reaction which employs less than six mole percent of palladium catalyst and no phosphine is disclosed. With this modified Heck reaction, an O-alkenylaryl macrolide can be obtained in a much shorter reaction time than under conventional Heck reaction conditions. The modified Heck reaction can be utilized in a method for phosphine-free arylation of an O-allylic erythromycin derivative, in a method for preparing an O-alkenylaryl erythromycin A derivative, or in a method for preparing a 2?, 4?-hydroxyl protected 6-O-alkenylaryl erythromycin A derivative.

Abstract: An efficient arylation technique for use in the synthesis of erythromycin derivatives, involving a modified Heck reaction which employs less than six mole percent of palladium catalyst and no phosphine is disclosed. With this modified Heck reaction, an O-alkenylaryl macrolide can be obtained in a much shorter reaction time than under conventional Heck reaction conditions. The modified Heck reaction can be utilized in a method for phosphine-free arylation of an O-allylic erythromycin derivative, in a method for preparing an O-alkenylaryl erythromycin A derivative, or in a method for preparing a 2′,4″-hydroxyl protected 6-O-alkenylaryl erythromycin A derivative.