343969-48-2

Basic information

• Product Name: S-tert-butyl (2S)-[(1S,2S)-3-oxo-2-(3-oxo-4-phenylthiobutyl)cyclopentyl-]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate
• Synonyms: S-tert-butyl (2S)-[(1S,2S)-3-oxo-2-(3-oxo-4-phenylthiobutyl)cyclopentyl-]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate
• CAS NO: 343969-48-2
• Molecular Weight: 548.808
• Mol File: 343969-48-2.mol

Chemical Properties

• CAS DataBase Reference: S-tert-butyl (2S)-[(1S,2S)-3-oxo-2-(3-oxo-4-phenylthiobutyl)cyclopentyl-]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate(CAS DataBase Reference)
• NIST Chemistry Reference: S-tert-butyl (2S)-[(1S,2S)-3-oxo-2-(3-oxo-4-phenylthiobutyl)cyclopentyl-]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate(343969-48-2)
• EPA Substance Registry System: S-tert-butyl (2S)-[(1S,2S)-3-oxo-2-(3-oxo-4-phenylthiobutyl)cyclopentyl-]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate(343969-48-2)

Safety Data

• Hazardous Substances Data: 343969-48-2(Hazardous Substances Data)

Upstream product

• 66613-24-9 (phenylsulfanyl)methyl vinyl ketone 
• 1120-73-6 2-methyl-2-cyclopenten-1-one 
• 332950-54-6 S-tert-butyl 3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate 

Downstream Products

• 332950-58-0 S-tert-butyl (2S)-2-[(1S,5R,7aS)-5-hydroxy-7a-methyl-4-phenylthio-2,3,5,6,7,7a-hexahydro-1H-inden-1-yl]-3-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]propanethioate 
• 681180-44-9 methyl (5S)-5-[(1S,3aS,4S,7aS)-7a-methyl-4-(phenylsulfonyl)octahydro-1H-inden-1-yl]hexanoate 
• 343969-52-8 methyl (2E,5S)-5-[(1S,3aS,4S,7aS)-7a-methyl-4-(phenylsulfonyl)octahydro-1H-inden-1-yl]hex-2-enoate 
• 681180-43-8 (3S,5S)-2-methyl-5-[(1S,3aS,4S,7aS)-7a-methyl-4-(phenylsulfonyl)octahydro-1H-inden-1-yl]hexane-2,3-diol 
• 343969-51-7 (4S)-2,2,5,5-tetramethyl-4-{(2S)-2-[(1S,3aS,4S,7aS)-7a-methyl-4-(phenylsulfonyl)octahydro-1H-inden-1-yl]propyl}-1,3-dioxolane 
• 681180-39-2 (1S,5R,7aS)-1-{(1S)-1-(hydroxymethyl)ethyl-2-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]}-7a-methyl-4-phenylthio-2,3,5,6,7,7a-hexahydro-1H-inden-5-ol 
• 325957-60-6 [(S)-5-((1S,3aS,4S,7aS)-4-Benzenesulfonyl-7a-methyl-octahydro-inden-1-yl)-1,1-dimethyl-hexyloxy]-triethyl-silane 
• 343969-50-6 (1S,5R,7aS)-7a-methyl-4-phenylthio-1-{(1S)-2-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]-1-(tosyloxymethyl)ethyl}-2,3,5,6,7,7a-hexahydro-1H-inden-5-ol 
• 681180-40-5 (1S,5R,7aS)-7a-methyl-4-phenylsulfonyl-1-{(1S)-2-[(4S)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]-1-(tosyloxymethyl)ethyl}-2,3,5,6,7,7a-hexahydro-1H-inden-5-ol 
• 332950-57-9 2-(7a-methyl-5-oxo-4-phenylsulfanyl-2,3,5,6,7,7a-hexahydro-1H-inden-1-yl)-3-(2,2,5,5-tetramethyl-[1,3]dioxolan-4-yl)-thiopropionic acid S-tert-butyl ester 

Relevant articles and documents

Enantioselective total synthesis of a trans-hydrindane rings/side-chain building-block of vitamin D - Asymmetric induction in an acid-catalyzed conjugate-addition reaction

For the enantioselective total synthesis of 1α,25-dihydroxyvitamin D3 (3), we have developed an enantioselective approach to the "northern" portion building-block 8, starting from the optically active hexanoic acid derivative 44, 2-methylcyclopent-2-en-1-one (10) and 1-(phenylthio)but-3-en-2-one (9). The steric course of the addition reaction of homochiral (S)-ketene acetals 28, 40, 44 and 58 with 10 was examined. We found that in the cases of 28, 44 and 40, the reactions occur with high simple and induced (facial) diastereoselectivities. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

The first synthesis and biological testing of the enantiomer of 1α,25-dihydroxyvitamin D3

The 1α,25-dihydroxyvitamin D3 enantiomer was synthesized and examined in biological tests. The ring A precursor was prepared from vitamin D2 employing the Mitsunobu reaction for inversion of the configuration at C-3 and SeO2 hydroxylation at C-1. The CD rings-side chain portion was synthesized from an optically active hexanoic acid derivative using diastereoselective tandem Mukaiyama-Michael addition and vinylsulfone reduction as the key steps. The ring A and CD rings building blocks were combined using the Julia alkenylation reaction. 1α,25-Dihydroxyvitamin D3 enantiomer shows no significant affinity to the vitamin D receptor.

1,3- versus 1,4-Asymmetric induction in Mukaiyama-Michael additions of optically active ketene acetals to 2-methylcyclopent-2-en-1-one: A remarkable inversion of facial selectivity

TrSbCl6-catalyzed addition of selected optically active ketene acetals to 2-methylcyclopent-2-en-1-one for steroid synthesis is described. Inversion of facial selectivity in 1,3- and 1,4-asymmetric induction was observed.