1. A method for epimerizing the hydroxy group of an aldol moiety which comprises contacting a compound containing an aldol moiety with a titanium tetraalkoxide reagent under suitable conditions and for a sufficient time to permit epimerization.
2. The method of claim 1 wherein the titanium tetraalkoxide reagent is titanium tetraisopropoxide.
3. The method of claim 1 which further comprises recovering the epimerized product.
4. The method of claim 1 wherein the aldol-containing compound is a rapamycin.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for enabling proximity-triggered messaging in certain coverage areas for social networks and communities-based services, the method comprising:
broadcasting, in the licensed spectrum of at least one mobile network operator and from at least one local unit, each one located within a corresponding coverage area, a LAC different from any other LAC of the radio cells of the mobile network in the surroundings;
establishing each local unit a Location Update dialog with any mobile phone answering to the LAC broadcast, obtaining from each answering mobile phone its IMSI number;
sending each local unit a Location Updating Reject message to each mobile phone whose IMSI number has been obtained;
sending each local unit the IMSI number of each answering mobile phone to a central unit;
obtaining, for each IMSI number, at least one valid identity in a community-based service; and
providing at least one social network server associated to the corresponding valid on-line identity with the event composed of the valid identity plus the location and time where and when it was obtained.
2. The method according to claim 1, wherein the valid identity of a community-based service is any of the following:
MSISDN,
email account,
account of the user in the community-based service,
identity token known by the community-based service.
3. The method according to claim 1, wherein the coverage area of the at least one local unit is configurable through at least one of the following parameters:
the transmission power to modify the reach;
the radiation pattern of the antenna system to modify the shape of the coverage area,
the system information parameters that the regular cells in the mobile network are broadcasting to all mobile phones.
4. The method according to claim 1, wherein the step of obtaining, for each IMSI number, the at least one valid identity in a community-based service comprises retrieving said valid identity corresponding to said IMSI number from a corresponding mobile operator.
5. The method according to claim 1, wherein the step of obtaining, for each IMSI number, the at least one valid identity in a community-based service comprises retrieving said valid identity corresponding to said IMSI number from a database linked to the community-based service.
6. The method according to claim 1, wherein it the broadcasting of the at least one local unit is carried out at the same time in spectrum of different radio technologies of the same mobile network operator.
7. The method according to claim 1, wherein the broadcasting of the at least one local unit is carried out at the same time in spectrum of different mobile operators, the central unit managing the identities captured for the mobile phones of those said mobile operators.
8. A system for enabling proximity-triggered messaging in certain coverage areas for social networks and communities-based services, the system comprising:
at least one local unit provided with cellular radio transceiver means for transmitting and receiving signals in the licensed spectrum of at least one mobile network operator, each local unit being located within a corresponding coverage area, and being configured to:
broadcast a LAC different from any other LAC of the radio cells of the mobile network in the surroundings;
establish a Location Update dialogue with any mobile phone answering to the LAC broadcast, obtaining from each answering mobile phone its IMSI number;
send a Location Updating Reject message to each mobile phone whose IMSI number has been obtained;
send said IMSI number to a central unit;
the central unit, configured to:
obtain, for each IMSI number, at least one valid identity in a community-based service;
provide at least one social network server associated to the corresponding valid on-line identity with the event composed of the valid identity plus the location and time where and when it was obtained.
9. The system according to claim 8, wherein the valid identity of a community-based service is any of the following:
MSISDN,
email account,
account of the user in the community-based service,
identity token known by the community-based service.
10. The system according to claim 8, wherein the at least one local unit comprises means for configuring at least one of the following parameters that determines its corresponding coverage area:
the transmission power to modify the reach;
the radiation pattern of the antenna system to modify the shape of the coverage area;
the system information parameters that the regular cells in the mobile network are broadcasting to all mobile phones.
11. The system according to claim 8, in which the central unit is remote to the at least one local unit, wherein the central unit is configured for remotely managing the at least one local unit.
12. The system according to claim 8, wherein the central unit is configured to, for each IMSI number received, retrieve the identity corresponding to said IMSI number from a corresponding mobile operator.
13. The system according to claim 8, wherein the central unit is further configured, when obtaining for each IMSI number at least one valid identity in a community-based service, to retrieve said valid identity corresponding to said IMSI number from a database linked to the community-based service.
14. The system according to claim 8, wherein the at least one local unit is configured to carry out the broadcasting at the same time in spectrum of different mobile operators, being the central unit configured to manage the identities captured for the mobile phones of those said mobile operators.
15. The system according to claim 8, wherein the at least one local unit is configured to carry out the broadcasting at the same time in spectrum of different radio technologies of the same mobile network operator.