Me Methyl
DCC 1,3-dicyclohexylcarbodiimide
MEM b-methoxyethoxymethyl
DCE 1,2-dichloroethane
Mes Mesityl
DDQ 2,3-dichloro-5,6-dicyano-1,4-benzoquinone
Min Minute
Þ % diasteromeric excess
MOM methoxymethyl
DEA Diethylamine
Ms Methanesulfonyl
DEAD Diethyl azodicarboxylate
MS Molecular sieves (3 or 4 ?)
Dibal-H Diisobutylaluminum hydride
MTM Methylthiomethyl
diphos (dppe) 1,2-bis (diphenylphosphino)ethane
Naphth Naphthyl
diphos-4 (dppb) 1,4-bis (diphenylphosphino)butane
NBD Norbornadiene
NBS N-Bromosuccinimide
TASF Tris(diethylamino)sulfonium difluorotrimethyl silicate
NCS N-chlorosuccinimide
TBAF Tetrabutylammonium fluoride
Ni(R) Raney Nickel
TBDMS, TBS t-butyldimethylsilyl
NMO N-methyl morpholine-n-oxide
TBHP t-butylhydroperoxide
PCC Pyridinium chlorochromate