| 词条 | Threose |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 470609476 | Reference = [1] | ImageFile1 = D-threose.svg | ImageSize1 = 150px | ImageCaption1 = D-Threose | ImageFile2 = L-threose.svg | ImageSize2 = 150px | ImageCaption2 = L-Threose | IUPACName = (2S,3R)-2,3,4-Trihydroxybutanal (D) (2R,3S)-2,3,4-Trihydroxybutanal (L) | OtherNames = Threotetrose |Section1={{Chembox Identifiers | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 388736 | InChI = 1/C4H8O4/c5-1-3(7)4(8)2-6/h1,3-4,6-8H,2H2/t3-,4-/m1/s1 | InChIKey = YTBSYETUWUMLBZ-QWWZWVQMBY | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/C4H8O4/c5-1-3(7)4(8)2-6/h1,3-4,6-8H,2H2/t3-,4-/m1/s1 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = YTBSYETUWUMLBZ-QWWZWVQMSA-N | CASNo = 95-43-2 | CASNo_Ref = {{cascite|changed|??}} | CASNo_Comment = (D) | CASNo1 = 95-44-3 | CASNo1_Ref = {{cascite|correct|CAS}} | CASNo1_Comment = (L) | PubChem = 439665 | PubChem_Comment = (D) | ChEBI_Ref = {{ebicite|correct|EBI}} | ChEBI = 28587 | SMILES = O=C[C@@H](O)[C@H](O)CO | SMILES_Comment = (D) | SMILES1 = OC[C@H](O)[C@@H](O)C=O | SMILES1_Comment = (L) }} |Section2={{Chembox Properties | C=4 | H=8 | O=4 | Appearance = Syrup | Density = | MeltingPt = | BoilingPt = | Solubility = Very soluble |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }} Threose is a four-carbon monosaccharide with molecular formula C4H8O4. It has a terminal aldehyde group rather than a ketone in its linear chain, and so is considered part of the aldose family of monosaccharides. The threose name can be used to refer to both the D- and L-stereoisomers, and more generally to the racemic mixture (D/L-, equal parts D- and L-) as well as to the more generic threose structure (absolute stereochemistry unspecified). The prefix "threo" which derives from threose (and "erythro" from a corresponding diastereomer erythrose) offer a useful way to describe general organic structures with adjacent chiral centers, where "the prefixes... designate the relative configuration of the centers".[2] As is depicted in a Fischer projection of D-threose, the adjacent substituents will have a syn orientation in the isomer referred to as "threo", and are anti in the isomer referred to as "erythro".[2][3] {{clear-left}}See also
References1. ^Merck Index, 11th Edition, 9317 {{Carbohydrates}}2. ^1 Formulas Using Other Configurational Notations, W. Rausch, accessed 1 March 2011 3. ^Prof. Rausch helpfully notes that the prefixes "may be applied to racemic compounds, as well as pure enantiomers and meso compounds", and that when depicted in the common "zig-zag" representation, adjacent "substituents may lie on the same side of the carbon chain... [syn] or on opposite sides... [anti]", which is opposite of their depiction in a Fischer projection. 1 : Aldotetroses |
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