Reduction of lactones 1, which were prepared by {TAIL ~ the previously disclosed methods} , with DIBAL H followed by acid catalyzed methylation provides {HEAD ~ lactal intermediates} 2 
Reduction of lactones 1 , which were prepared by { TAIL ~ the previously disclosed methods } , with DIBAL H followed by acid catalyzed methylation provides { HEAD ~ lactal intermediates } 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH