methyl 5-(tert-butyldimethylsilanoxy)-2-diazo-5-(p-tolyl)-3-oxopentanoate
methyl (5R,6R)-6-((tertbutyldimethylsilyl)oxy)-6-(4-fluorophenyl)-5-methyl-6-((trimethylsilyl)oxy)hex-2-ynoate
methyl (5R,6R)-6-(4-acetoxyphenyl)-6-((tertbutyldimethylsilyl)oxy)-5-methyl-6-((trimethylsilyl)oxy)hex-2-ynoate
methyl (5R,6R)-6-((tertbutyldimethylsilyl)oxy)-5-methyl-6-(3-(trifluoromethyl)phenyl)-6-((trimethylsilyl)oxy)hex-2-ynoate
methyl (5R,6R)-6-((tert-butyldimethylsilyl)oxy)-5-methyl-6-phenyl-6-((trimethylsilyl)oxy)hex-2-ynoate