**Abbreviations**

Acac: acetylacetone; AIBN: azobisisobutyronitrile; CAB: (acyloxy)borane; CAN: ceric ammonium nitrate; CSA: camphorsulfonic acid; CuTC: copper(I) thiophene-2-carboxylate; DBU: 1,8- diazabicyclo[5.4.0]undec-7-ene; dba: dibenzylideneacetone; DDQ: 2,3-dichloro-5,6-dicyano-*p*benzoquinone; (+)-DET: diethyl tartrate; (DHQD)2PHAL: hydroquinidine 1,4-phthalazinediyl diether; DMAP: 4-dimethylaminopyridine; DMI: 1,3-dimethyl-2-imidazolidinone; DMF: dimethylformamide; DMI: 1,3-dimethyl-2-imidazolidinone; DMP: Dess-Martin periodinane; DMPA: dimethylol

propionic acid; DMPM: 3,4-dimethoxybenzyl; DMSO: dimethyl sulphoxide; KHMDS: potassium bis(trimethylsilyl)amide; LiHDMS: lithium bis(trimethylsilyl)amide; *m*CPBA: meta-chloroperoxybenzoic acid; MNBA: 2-methyl-6-nitrobenzoic anhydride; MOM: methoxymethyl; Ms: methanesulfonyl; NMP: *n*-methylpyrrolidone; PMB: *p*-methoxybenzyl; PPTS: pyridinium *p*-toluenesulfonate; PT: 1- phenyltetrazol-5-yl; TASF: tris(dimethylamino)sulfonium difluorotrimethylsilicate; TBAF: tetrabutylammonium fluoride; TBCO: 2,4,4,6-tetrabromo-2,5-cyclohexadienone; TBDPS: *tert*-butyldiphenylsilyl; TES: triethylsilyl; TFA: trifluoroacetic acid; TIPS: triisopropylsilyl; TMS: trimethylsilyl; Tr: triphenyl methyl; Ts: tosyl.
