US 9,612,535 B2  92  91  -continued  -continued  CH3  I  -----f  CH2 -C  -r- OAO  CH3  I  -----f  CH2-C-r- OAO  CH3  I  -----f  CH2-C-t-- OAO  -----fCH2-CH-t- OAO  -----tCH2-CH-t- OAO  CCC)  #  CH3  I  -----f  CH2-C-t-- OAO  CD)  #  -----fCH2-CH  -t- OAO  ~  CH3  I  -----f  CH2-C-r- OAO  ~  -----fCH2-CH-t- OAO  en  OMe  CH3  I  -----f  CH2-C-t-- OAO  en  OMe  -----tCH2-CH-t- OAO  co  OMe 