JP2012067028A - METHOD OF PRODUCING α-D-FRUCTOFURANOSYL-(2←→1)-α-D-GLUCOPYRANOSIDE - Google Patents

METHOD OF PRODUCING α-D-FRUCTOFURANOSYL-(2←→1)-α-D-GLUCOPYRANOSIDE Download PDF

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JP2012067028A
JP2012067028A JP2010212107A JP2010212107A JP2012067028A JP 2012067028 A JP2012067028 A JP 2012067028A JP 2010212107 A JP2010212107 A JP 2010212107A JP 2010212107 A JP2010212107 A JP 2010212107A JP 2012067028 A JP2012067028 A JP 2012067028A
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glucopyranoside
fructofuranosyl
sugar
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glucose
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Akira Yamamori
昭 山森
Hidenori Okada
秀紀 岡田
Naoki Kawazoe
直樹 川添
Tokuo Shiomi
徳夫 塩見
Shuichi Onodera
秀一 小野寺
Takashi Ueno
敬司 上野
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OTAKA KOSO KK
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Abstract

PROBLEM TO BE SOLVED: To provide an oligosaccharide of a novel structure, and a method of producing the same.SOLUTION: There is disclosed α-D-fructofuranosyl-(2←→1)-α-D-glucopyranoside represented by formula (1) which is produced by heating D-glucose and D-fructose in the absence of an enzyme.

Description

本発明は、新規オリゴ糖及びその製造方法に関し、詳しくはショ糖のフルクトース部分がα−フルクトフラノースで2←→1結合している新規オリゴ糖に関する。   The present invention relates to a novel oligosaccharide and a method for producing the same, and more particularly, to a novel oligosaccharide in which the fructose portion of sucrose is linked 2?

また本発明は、グルコースとフルクトースの共存下において、酵素反応を利用することなく加熱条件下で反応させて新規オリゴ糖であるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを製造する方法に関する。   Further, the present invention is a novel oligosaccharide, α-D-fructofuranosyl- (2 ← → 1) -α-, which is reacted under heating conditions without using an enzyme reaction in the presence of glucose and fructose. The present invention relates to a method for producing D-glucopyranoside.

フルクトースとグルコースが2←→1結合しているオリゴ糖としてショ糖(スクロース)が知られている。ショ糖は、β−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドと表されるが(非特許文献1)、ショ糖のβ−D−フルクトフラノシル部分が、α−D−フルクトフラノースとなった二糖類、即ち、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドについては知られておらず、またその製造方法も知られていない。   Sucrose is known as an oligosaccharide in which fructose and glucose are linked by 2 ← → 1. Sucrose is expressed as β-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside (Non-patent Document 1), but the β-D-fructofuranosyl portion of sucrose is , Α-D-fructofuranose, that is, α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside is not known, and its production method is also unknown.

「生化学辞典」(第2版)686頁、1992年2月5日 株式会社東京化学同人発行"Biochemical Dictionary" (2nd edition), page 686, February 5, 1992, published by Tokyo Chemical Co., Ltd.

本発明は、新規な構造を持つオリゴ糖を提供すること、並びに新規なオリゴ糖を製造する方法を提供することを課題とする。   An object of the present invention is to provide an oligosaccharide having a novel structure and to provide a method for producing the novel oligosaccharide.

本発明は、糖質材料としてD−グルコースとD−フルクトースを用い、酵素反応を利用することなく、加熱して反応させて、反応物中の新規オリゴ糖について検索し、分離しTOF−MS分析およびNMR分析した結果、いかなる標品とも一致しない未知のオリゴ糖を検出した。   In the present invention, D-glucose and D-fructose are used as carbohydrate materials, and the reaction is carried out by heating without using an enzyme reaction. The novel oligosaccharides in the reaction product are searched, separated, and analyzed by TOF-MS. As a result of NMR analysis, unknown oligosaccharides that do not match any standard were detected.

本発明の新規オリゴ糖は、次式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシド(略語としてα−Ff2−1Gと呼ぶことがある。)である。   The novel oligosaccharide of the present invention is called α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside (abbreviated as α-Ff2-1G) represented by the following formula (1). Yes.)

Figure 2012067028
Figure 2012067028

本発明の新規オリゴ糖の製造方法は、D−グルコースとD−フルクトースを用い、酵素が存在しない条件下で、加熱して反応させて前記式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを生成させ、反応物中からα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを取得することを特徴とする。   The novel oligosaccharide production method of the present invention uses α-D-fruct represented by the above formula (1) by using D-glucose and D-fructose and reacting by heating in the absence of enzyme. Furanosyl- (2 ← → 1) -α-D-glucopyranoside is produced, and α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside is obtained from the reaction product. And

さらに一つの具体的な本発明のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法は、前記のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法において、D−グルコースおよびD−フルクトースの混合物に対して水を添加することなく固相で加熱して反応させ、次いで反応物に水を添加し溶解させて、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを含有する水溶液とし、該水溶液からα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを取得することを特徴とする。   Still another specific method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside of the present invention is the above-mentioned α-D-fructofuranosyl- (2 ← → 1) In the method for producing -α-D-glucopyranoside, a mixture of D-glucose and D-fructose is reacted by heating in a solid phase without adding water, and then water is added to the reaction and dissolved. Α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside, and α-D-fructofuranosyl- (2 ← → 1) -α- It is characterized by obtaining D-glucopyranoside.

本発明のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法において加熱反応させる際の温度条件は、100℃以上200℃以下となる条件が好ましい。   In the method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside of the present invention, the temperature condition for the heat reaction is preferably 100 ° C. or more and 200 ° C. or less.

本発明の前記式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドは、新規化合物として有用である。   The α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside represented by the formula (1) of the present invention is useful as a novel compound.

本発明のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法は、新規化合物の製造方法として有用である。   The method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside of the present invention is useful as a method for producing a novel compound.

糖1について加熱処理済糖混合溶液を活性炭カラムにかけて、5%エタノールで溶出した画分をODS−80Tsカラムに供したチャートを示す図である。It is a figure which shows the chart which applied the heat-processed sugar mixed solution about sugar 1 to the activated carbon column, and used the fraction eluted with 5% ethanol to the ODS-80Ts column. 糖1についてMALDI−TOF MSの結果のチャートを示す図である。It is a figure which shows the chart of the result of MALDI-TOF MS about sugar 1. 糖1について1次元プロトンNMRの結果のチャートを示す図である。It is a figure which shows the chart of the result of one-dimensional proton NMR about the saccharide | sugar 1. FIG. 糖1について1次元カーボンNMRの結果のチャートを示す図である。It is a figure which shows the chart of the result of one-dimensional carbon NMR about the saccharide | sugar 1. FIG. 糖1について2次元NMRとしてCOSYの結果のチャートを示す図である。It is a figure which shows the chart of the result of COSY as two-dimensional NMR about sugar 1. 糖1について2次元NMRとしてE−HSQCの結果のチャートを示す図である。It is a figure which shows the chart of the result of E-HSQC as two-dimensional NMR about the saccharide | sugar 1. FIG. 糖1について2次元NMRとしてHSQC−TOCSYの結果のチャートを示す図である。It is a figure which shows the chart of the result of HSQC-TOCSY as two-dimensional NMR about the saccharide | sugar 1. FIG. 糖1について2次元NMRとしてHMBCの結果のチャートを示す図である。It is a figure which shows the chart of the result of HMBC as 2D NMR about the saccharide | sugar 1. FIG.

本発明のα−Ff2−1Gの製造に用いるD−グルコースには、 β−D−グルコース、 無水のD−グルコース、 1 水和物のD−グルコース、 アノマー混合のD−グルコースの何れでもよい。D−グルコース、 D−フルクトースには市販のものが好適に利用できる。 また、 本発明で利用可能なD−グルコース、 D−フルクトースの形態は、 粉末状或いは顆粒の状態でもよい。   The D-glucose used for the production of α-Ff2-1G of the present invention may be any of β-D-glucose, anhydrous D-glucose, monohydrate D-glucose, and anomeric mixed D-glucose. Commercially available products can be suitably used for D-glucose and D-fructose. The form of D-glucose and D-fructose that can be used in the present invention may be in the form of powder or granules.

本発明において使用する水には、 反応条件を厳密にする目的で精製水を用いることが好ましい。 精製水には、 ミリQ水、 蒸留水或いはイオン交換水を用いることができる。   The water used in the present invention is preferably purified water for the purpose of strict reaction conditions. For purified water, Milli-Q water, distilled water or ion exchange water can be used.

α−Ff2−1Gを含有する水溶液の製造の好ましい実施の態様として、 次の方法を示す。   As a preferred embodiment of the production of an aqueous solution containing α-Ff2-1G, the following method is shown.

(本発明のオリゴ糖を含有する水溶液の製造方法)
粉末状または顆粒状のD−グルコースとD−フルクトースを三角フラスコにとり混合し、 水を添加しない状態で、 100℃以上200℃以下、好ましくは110℃以上180℃以下、 最も好ましくは120℃以上150℃以下に加熱する。 加熱反応時の温度が100℃未満であるとα−Ff2−1Gの十分な製造はされず、 また200℃を超えるとカラメル化は進み、 α−Ff2−1Gの製造効率が落ちるため好ましくない。
(Method for producing an aqueous solution containing the oligosaccharide of the present invention)
Powdered or granular D-glucose and D-fructose are mixed in an Erlenmeyer flask, and in a state where water is not added, 100 ° C to 200 ° C, preferably 110 ° C to 180 ° C, most preferably 120 ° C to 150 ° C. Heat to below ℃. If the temperature during the heating reaction is less than 100 ° C, α-Ff2-1G is not sufficiently produced, and if it exceeds 200 ° C, caramelization proceeds and the production efficiency of α-Ff2-1G is unfavorable.

加熱時間は好ましくは10分から90分間、 さらに好ましくは20分から60分間加熱処理し、 精製水を添加後溶解し、 濾過してα−Ff2−1Gを生成した糖溶液を得ることができる。 濾過は、 ディスポーサブル0.45μmあるいは0.22μmフィルター(例えば、孔径0.45μmあるいは0.22μmのDISMIC−25cs Cellulose Acetate)で濾過してα−Ff2−1G含有糖溶液とすることができる。 このα−Ff2−1G含有糖溶液は、 −4℃以下(好ましくは−80℃以下)のフリーザーで凍結させることにより保存できる。   The heating time is preferably 10 minutes to 90 minutes, more preferably 20 minutes to 60 minutes, and after adding purified water, it is dissolved and filtered to obtain a sugar solution in which α-Ff2-1G is produced. Filtration can be performed with a disposable 0.45 μm or 0.22 μm filter (for example, DISMIC-25cs Cellulose Acetate having a pore diameter of 0.45 μm or 0.22 μm) to obtain an α-Ff2-1G-containing sugar solution. This α-Ff2-1G-containing sugar solution can be preserved by freezing in a freezer at −4 ° C. or lower (preferably −80 ° C. or lower).

(糖サンプル溶液の製造)
D−グルコース30gとD−フルクトース30gを300mlの三角フラスコに入れ混合し、アルミホイルで蓋をし、水を添加することなく予め150℃に温めておいた電気炉で1時間加熱した。加熱後、反応物にMilli−Q水を加えて総量が300mlとなるように溶解させることにより糖サンプル溶液を得た。
(Manufacture of sugar sample solution)
30 g of D-glucose and 30 g of D-fructose were mixed in a 300 ml Erlenmeyer flask, covered with aluminum foil, and heated in an electric furnace preheated to 150 ° C. without adding water. After heating, Milli-Q water was added to the reaction product and dissolved so that the total amount became 300 ml, thereby obtaining a sugar sample solution.

(未知の糖1の分離)
前記糖サンプル溶液の製造工程で得られた糖サンプル溶液を活性炭セライトカラムクロマトグラフィー(4.8cm×36cm)に添加し、画分1(水溶出画分:約3000mL)、画分2(5%エタノール溶出画分:約1000mL)の順で溶出させ、溶出させたサンプルは、それぞれ減圧濃縮装置を用いて濃縮した。
(Separation of unknown sugar 1)
The sugar sample solution obtained in the production process of the sugar sample solution was added to activated carbon celite column chromatography (4.8 cm × 36 cm), fraction 1 (water elution fraction: about 3000 mL), fraction 2 (5% (Elution fraction of ethanol: about 1000 mL), and the eluted samples were each concentrated using a vacuum concentrator.

それぞれ濃縮したサンプルについて、HPLC装置(デュアルポンプ(DP−8020:商品名、東ソー株式会社製)、検出器(RI−8020:商品名、東ソー株式会社製))、インテグレータ(Chromatocorder 21 :商品名、東ソー株式会社製)、カラム(ODS−80Ts column(4.6mm×25cm×2:商品名、東ソー株式会社製)、溶出(H2 O、0.4mL/min)、カラム温度(室温)、注入量(100μL)を行った。以後この分析条件を「HPLC条件−A」とする。その結果、5%エタノールで溶出させた画分2の中に、未同定ピーク(32分頃)が検出していることが認められたため、この目的のピークを糖1とした。図1にクロマトグラフィーのチャートを示す。 About each concentrated sample, HPLC apparatus (dual pump (DP-8020: trade name, manufactured by Tosoh Corporation), detector (RI-8020: trade name, manufactured by Tosoh Corporation)), integrator (Chromatocorder 21: trade name, Manufactured by Tosoh Corporation), column (ODS-80Ts column (4.6 mm × 25 cm × 2: trade name, manufactured by Tosoh Corporation), elution (H 2 O, 0.4 mL / min), column temperature (room temperature), injection Thereafter, this analytical condition is referred to as “HPLC condition-A.” As a result, an unidentified peak (around 32 minutes) was detected in fraction 2 eluted with 5% ethanol. Therefore, the peak of interest was designated as sugar 1. A chromatographic chart is shown in FIG.

目的のピーク糖1について、HPLC条件−Aを行い20回分取した。ただし、得られた画分については単一になっていない場合は、HPLC条件−Aを繰り返し行い精製した。得られた分取液を凍結濃縮乾燥し、2.5mgの糖1の凍結乾燥物を得た。   The target peak sugar 1 was subjected to HPLC condition-A and collected 20 times. However, when the obtained fraction was not single, it was purified by repeating HPLC condition-A. The obtained fraction was freeze-concentrated and dried to obtain 2.5 mg of lyophilized product of sugar 1.

(糖1の化学構造の決定)
前記工程において分離、精製した糖1について、以下の機器分析を行い、その化学構造を以下のように決定した。分離した糖1のTOF−MS分析の結果、得られたピークは365の(M+Na)イオンピークを与えた(糖1のMALDI−TOF MSの結果のチャートを図2に示す)。
(Determination of the chemical structure of sugar 1)
The sugar 1 separated and purified in the above step was subjected to the following instrumental analysis, and its chemical structure was determined as follows. As a result of TOF-MS analysis of separated sugar 1, the obtained peak gave 365 (M + Na) ion peaks (chart of MALDI-TOF MS result of sugar 1 is shown in FIG. 2).

次に、糖1について1次元プロトンNMR、1次元カーボンNMR、並びに2次元NMRとしてCOSY、E−HSQC、HSQC−TOCSYおよびHMBCを行った。それらのチャートを図3〜図8に示す。また、糖1のケミカルシフトを表1に示す。   Next, COSY, E-HSQC, HSQC-TOCSY, and HMBC were performed on sugar 1 as one-dimensional proton NMR, one-dimensional carbon NMR, and two-dimensional NMR. Those charts are shown in FIGS. The chemical shift of sugar 1 is shown in Table 1.

Figure 2012067028
Figure 2012067028

以上の結果から糖1は、前記式(1)で表される新規化合物であるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドと決定した。   From the above results, sugar 1 was determined to be α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside, which is a novel compound represented by the formula (1).

本発明のオリゴ糖は、食品素材、医薬品素材の用途としての利用が期待できる。   The oligosaccharide of the present invention can be expected to be used as a food material or a pharmaceutical material.

本発明は、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法に関する。
The present invention relates to a method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside .

詳しくは、本発明は、グルコースとフルクトースの混合物に対して水を添加することなく、且つ、酵素が存在しない条件下で、固相で加熱して反応させてα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを製造する方法に関する。
More specifically, the present invention is such that α- D-fructofuranosyl- is reacted by heating in a solid phase without adding water to a mixture of glucose and fructose and in the absence of an enzyme. The present invention relates to a method for producing (2 ← → 1) -α-D-glucopyranoside.

フルクトースとグルコースが2←→1結合しているオリゴ糖としてショ糖(スクロース)が知られている。ショ糖は、β−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドと表され(非特許文献1)
Sucrose is known as an oligosaccharide in which fructose and glucose are linked by 2 ← → 1. Sucrose, beta-D-fructofuranosyl - it expresses and (2 ← → 1) -α- D- glucopyranoside (Non-Patent Document 1).

本発明は、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの新規な製造方法を提供することを課題とする。
An object of the present invention is to provide a novel method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside .

本発明は、糖質材料としてD−グルコースとD−フルクトースの混合物に対して水を添加することなく、且つ、酵素反応を利用することなく、加熱して反応させて、反応物中の新規オリゴ糖について検索し、分離しTOF−MS分析およびNMR分析した結果、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを検出した。
The present invention relates to a novel oligo in a reaction product by heating and reacting a mixture of D-glucose and D-fructose as a carbohydrate material without adding water and utilizing an enzyme reaction. As a result of searching for sugar, separating it, and performing TOF-MS analysis and NMR analysis, α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside was detected.

前記α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシド(略語としてα−Ff2−1Gと呼ぶことがある。)は、次式(1)で表される
The α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside (sometimes abbreviated as α-Ff2-1G) is represented by the following formula (1) .

本発明のオリゴ糖の製造方法は、D−グルコースおよびD−フルクトースの混合物に対して水を添加することなく、且つ、酵素が存在しない条件下で、固相で100℃以上200℃以下で加熱して反応させ、次いで反応物に水を添加し溶解させて、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを含有する水溶液とし、該水溶液をクロマトグラフィーに付し、エタノールを含有する水溶液で溶出して前記式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを取得することを特徴とする。
The method for producing an oligosaccharide according to the present invention comprises heating to 100 ° C. or more and 200 ° C. or less in a solid phase without adding water to a mixture of D-glucose and D-fructose and in the absence of an enzyme. Then, water is added and dissolved in the reaction product to obtain an aqueous solution containing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside, which is subjected to chromatography. And α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside represented by the above formula (1) is obtained by elution with an aqueous solution containing ethanol. .

本発明のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法は、新規な製造方法として有用である。
The production method of α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside of the present invention is useful as a novel production method .

糖1の分離)
前記糖サンプル溶液の製造工程で得られた糖サンプル溶液を活性炭セライトカラムクロマトグラフィー(4.8cm×36cm)に添加し、画分1(水溶出画分:約3000mL)、画分2(5%エタノール溶出画分:約1000mL)の順で溶出させ、溶出させたサンプルは、それぞれ減圧濃縮装置を用いて濃縮した。
(Separation of sugar 1 )
The sugar sample solution obtained in the production process of the sugar sample solution was added to activated carbon celite column chromatography (4.8 cm × 36 cm), fraction 1 (water elution fraction: about 3000 mL), fraction 2 (5% (Elution fraction of ethanol: about 1000 mL), and the eluted samples were each concentrated using a vacuum concentrator.

以上の結果から糖1は、前記式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドと決定した。
More sugar 1 results, the formula (1) you express in alpha-D-fructofuranosyl - was determined (2 ← → 1) -α- D- glucopyranoside.

本発明の製造方法は、食品素材、医薬品素材の用途としての利用が期待できるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの新規な製造方法として有用である
The production method of the present invention is useful as a novel production method of α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside, which can be expected to be used for food materials and pharmaceutical materials. .

Claims (5)

次式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシド。
Figure 2012067028
Α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside represented by the following formula (1).
Figure 2012067028
D−グルコースとD−フルクトースを用い、酵素が存在しない条件下で、加熱して反応させて次式(1)で表されるα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを生成させ、反応物中からα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを取得することを特徴とするα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法。
Figure 2012067028
Α-D-fructofuranosyl- (2 ← → 1) -α represented by the following formula (1) by reacting with heating using D-glucose and D-fructose in the absence of enzyme -D-glucopyranoside is produced, and α-D-fructofuranosyl- (2- ← → 1) -α-D-glucopyranoside is obtained from the reaction product. (2 ← → 1) A process for producing α-D-glucopyranoside.
Figure 2012067028
請求項2に記載のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法において、
D−グルコースおよびD−フルクトースの混合物に対して水を添加することなく固相で加熱して反応させ、次いで反応物に水を添加し溶解させて、α−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを含有する水溶液とし、該水溶液からα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドを取得することを特徴とするα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法。
In the method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside according to claim 2,
The mixture of D-glucose and D-fructose is reacted by heating in a solid phase without adding water, and then the reaction product is added with water to dissolve α-D-fructofuranosyl- (2 ← → 1) an α-D-glucopyranoside-containing aqueous solution, and α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside is obtained from the aqueous solution A method for producing D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside.
前記加熱する際の温度条件は、100℃以上200℃以下である請求項2又は3に記載のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法。   The method for producing α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside according to claim 2 or 3, wherein the temperature condition at the time of heating is 100 ° C or higher and 200 ° C or lower. 前記D−グルコースおよびD−フルクトースが粉末状または顆粒状である請求項2乃至4のいずれか1項に記載のα−D−フルクトフラノシル−(2←→1)−α−D−グルコピラノシドの製造方法。   The α-D-fructofuranosyl- (2 ← → 1) -α-D-glucopyranoside according to any one of claims 2 to 4, wherein the D-glucose and D-fructose are powdery or granular. Manufacturing method.
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