40879-83-2

Upstream product

• 26922-36-1 methyl 2,3,6-trideoxy-α-DL-threo-hex-2-enopyranoside 
• 142545-29-7 4(S)-(N-Benzyl-N-tert-butyloxycarbonyl)amino-6-benzyloxy-2,3-(2S,3S)-isopropylidenedioxyhexane 
• 142545-23-1 4(S)-(N-Benzyl-N-tert-butoxycarbonyl)amino-6-benzyloxy-1,2-2(S)-epoxy-3(S)-hydroxyhexane 
• 142545-32-2 Benzyl-[(1S,2S,3S)-1-(2-benzyloxy-ethyl)-2,3-dihydroxy-butyl]-carbamic acid tert-butyl ester 
• 142545-24-2 4(S)-(N-Benzyl-N-tert-butoxycarbonyl)amino-6-benzyloxy-3(R)-hydroxyhexene-1 
• 142545-30-0 4(S)-(N-tert-Butyloxycarbonyl)amino-6-hydroxy-2,3-(2S,3S)-isopropylidenedioxyhexane 
• 142545-31-1 [(S)-3-Oxo-1-((4S,5S)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-propyl]-carbamic acid tert-butyl ester 
• 108-24-7 acetic anhydride 
• 18977-92-9 (3S,4S)-4-Amino-6-methoxy-2-methyl-tetrahydro-pyran-3-ol 
• 83803-05-8 2,3,4,6-tetradeoxy-4',5'-dihydro-2-iodo-2'-trichloromethyl(methyl α-DL-altropyranosido)<3,4-d>oxazole 
• 83803-03-6 methyl 2,3,6-trideoxy-4-O-trichloroacetimidoyl-α-DL-threo-hex-2-enopyranoside 
• 83803-06-9 2,3,4,6-tetradeoxy-4',5'-dihydro-2'-trichloromethyl(methyl α-DL-lyxo-hexopyranosido)<3,4-d>oxazole 
• 33647-82-4 methyl 2,3,6-trideoxy-α-DL-glycero-hex-2-enopyranosid-4-ulose 
• 33647-67-5 1-(2,5-dimethoxy-2,5-dihydrofuran-2-yl)ethanol from 2-Acetylfuran 

Relevant academic research and scientific papers

The total synthesis of L-daunosamine

N,O-Dibenzyl-N-tert-butoxycarbonyl-L-homoserinal (7), obtained from L-aspartic acid, reacts with vinylmagnesium chloride to afford with high stereoselectivity compound 6 which is subsequently transformed into the derivative of L

A DIHYDROISOXAZOLE-BASED ROUTE TO 2,3,6-TRIDEOXY-3-AMINOHEXOSE DERIVATIVES

Acosamine and ristosamine derivatives were prepared via stereoselective reductive cleavage reactions of a benzylidenated dihydroisoxazolyl diol; the diol was prepared from 3-nitro-4,5-dihydroisoxazole via sequential propynylation, Lindlar reduction, and c

SYNTHESIS OF (L)-DAUNOSAMINE AND RELATED AMINO SUGARS

1-(2-Furyl)ethanol (6) has been converted into methyl (+/-)-daunosaminide (1) and methyl (+/-)-ristosaminide (3) by use of an intramolecular cyclisation of a trichloroacetimidate group. (+/-)-Daunosamine (1) has been obtained more directly from the alcohol (10) by use of a modified Mitsunobu reaction; the scope of the latter reaction has been explored using cyclohex-2-en-1-ol as a model substrate.Asymmetric reduction of 2-acetylfuran (5) has given (S)-1-(2-furyl)ethanol (46) in good enantiomeric excess, thus providing a short route to the L-enantiomers of the amino sugars (1), (2), and (3) from a cheap, non-carbohydrate precursor.

SYNTHESIS OF N-TRIFLUOROACETYL-L-ACOSAMINE, N-TRIFLUOROACETYL-L-DAUNOSAMINE, AND THEIR 1-THIO ANALOGS

A simple and efficient route to N-trifluoroacetyl-L-acosamine (13), N-trifluoroacetyl-L-daunosamine (12), and their 1-thio analogues (18 and 20) is described.Stereoselective reduction of oxime 5 with borane, followed by trifluoroacetylation resulted in the arabino methyl glycoside (8), which, on mild acid hydrolysis gave N-trifluoroacetyl-L-acosamine (13) in an overall yield of 33percent, based on L-rhamnal (1).Upon oxidation of the C-4 hydroxyl group and stereoselective reduction of the resulting ketone 11, compound 8 of L-arabino configuration was converted into N-trifluoroacetyl-L-daunosamine (12) in a one-flask sequence with an overall yield of 28percent calculated for 1.Benzyl 1-thio-N-trifluoroacetyl-α-L-acosaminide (18) was synthesized from enone 2 on Michael-type addition of phenylmethanethiol, followed by oximation, stereoselective reduction with borane and subsequent trifluoroacetylation. 4-O-Acetyl-1-S-acetyl-N-trifluoroacetyl-1-thio-β-L-daunosamine 20 was prepared from 12 via the corresponding glycosyl chloride derivative.