化学外语翻译。。急求 10
Tothebestofourknowledge,aone-potsynthesisofastablee,e,trans-1trisadductofC60viaathree...
To the best of our knowledge, a one-pot synthesis of a stable
e,e,trans-1 trisadduct of C60 via a three-fold Bingel reaction
has not been reported in the literature. With this in mind, we
designed the structurally new tether 8 (Scheme 2) bearing three
malonate groups incorporated in a well preorganised molecularsystem comprised of two crown ether type macrocycles.
Additionally, to test the regioselectivity of bis-additions
on C60, the corresponding bismalonate tether 7 was designed
featuring the same structural characteristics with tether 8. The
synthesis of tethers 7 and 8 is described in Scheme 2
(for experimental details and characterisation data see ESIw).
2-Bromoethanol was protected as a TBDMS ether and subjected
to a two-fold Williamson etherification with 3,5-dihydroxybenzyl
alcohol to afford the benzyl alcohol 2. Protection of the
hydroxyl group with DHP followed by the selective deprotection
of the silyl ethers furnished diol 4 in good yield. To incorporate
the malonate moiety in a macrocycle we attempted the cyclisation
of diol 4 with malonyl dichloride under high dilution
conditions.11 In the absence of alkali metal cations, as templates,
the desired cyclised product 5 was not detected in the reaction
mixture. Consequently, we tested the esterification reaction by
using Li+, Na+ and K+ as templates, in the form of their
LiBF4, NaBF4, KPF6 and KBF4 salts. The highest yield of the
product (7%) was obtained when KBF4
12 was used,while
NaBF4 and KPF6 led to the formation of 5 in about 5%
isolated yield. The utilisation of the LiBF4 salt furnished 5 in
only 1% isolated yield. Worthy of note was that despite using
the templated synthesis, the employment of high dilution
conditions was necessary. In the next step, 5 was deprotected
under mild acidic conditions to afford successfully the benzylic
alcohol 6 which is the key intermediate to access the designed
tethers. In separate experiments, methyl malonyl chloride and
malonyl dichloride were reacted with 6, in DCM solvent
and using pyridine as a base. Tethers 7 and 8 were isolated by
flash column chromatography and their structures were
unambiguously assigned by 1H and 13C NMR spectroscopy
and by mass spectrometry (see ESIw) 展开
e,e,trans-1 trisadduct of C60 via a three-fold Bingel reaction
has not been reported in the literature. With this in mind, we
designed the structurally new tether 8 (Scheme 2) bearing three
malonate groups incorporated in a well preorganised molecularsystem comprised of two crown ether type macrocycles.
Additionally, to test the regioselectivity of bis-additions
on C60, the corresponding bismalonate tether 7 was designed
featuring the same structural characteristics with tether 8. The
synthesis of tethers 7 and 8 is described in Scheme 2
(for experimental details and characterisation data see ESIw).
2-Bromoethanol was protected as a TBDMS ether and subjected
to a two-fold Williamson etherification with 3,5-dihydroxybenzyl
alcohol to afford the benzyl alcohol 2. Protection of the
hydroxyl group with DHP followed by the selective deprotection
of the silyl ethers furnished diol 4 in good yield. To incorporate
the malonate moiety in a macrocycle we attempted the cyclisation
of diol 4 with malonyl dichloride under high dilution
conditions.11 In the absence of alkali metal cations, as templates,
the desired cyclised product 5 was not detected in the reaction
mixture. Consequently, we tested the esterification reaction by
using Li+, Na+ and K+ as templates, in the form of their
LiBF4, NaBF4, KPF6 and KBF4 salts. The highest yield of the
product (7%) was obtained when KBF4
12 was used,while
NaBF4 and KPF6 led to the formation of 5 in about 5%
isolated yield. The utilisation of the LiBF4 salt furnished 5 in
only 1% isolated yield. Worthy of note was that despite using
the templated synthesis, the employment of high dilution
conditions was necessary. In the next step, 5 was deprotected
under mild acidic conditions to afford successfully the benzylic
alcohol 6 which is the key intermediate to access the designed
tethers. In separate experiments, methyl malonyl chloride and
malonyl dichloride were reacted with 6, in DCM solvent
and using pyridine as a base. Tethers 7 and 8 were isolated by
flash column chromatography and their structures were
unambiguously assigned by 1H and 13C NMR spectroscopy
and by mass spectrometry (see ESIw) 展开
2个回答
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我们所掌握的最好知识,一锅法合成一个稳定的
e,e,trans-1 trisadduct通过3倍的Bingel C60的反应
没有报道的,文学。有鉴于此,我们
设计了结构性新缆索8(方案2)轴承三
与组织纳入一个好preorganised molecularsystem包括两个macrocycles冠醚型。
此外,来测试bis-additions区域选择消者清性的
对C60,相应的bismalonate缆索7设计
具有相同的结构特点与缆索8。这个
合成缆索7和8中描述的方案2
(用于实验的细节和描述数据看到ESIw)。
2-Bromoethanol保护作为一个TBDMS醚和接受
一个双重的威廉姆森醚化与3,5-dihydroxybenzyl
酒精买不起苯甲醇2。保护
羟基和详细紧随其后的选择性基
家具的硅基醚二4在好的产嫌兄量。将
在一个血红素蛋白中大环的平台与我们尝试cyclisation
二氯甲烷的4呈在高稀释
条件。11在缺乏碱金属阳离子,作为模板,
所需的cyclised产品5不能被探测到的反应
混合物。因此,我们检测了酯化反应
使用李+、钠和钾为模板,在他们的形式
LiBF4,NaBF4,KPF6和KBF4盐。 最高产量的
产品(7%)是KBF4时取得
12是使用,虽然
NaBF4和KPF6形成了5约在5%
孤立的产量。利用LiBF4家具的盐5
只有1%的孤立的产量。值得注意的是,尽管使用了
模板化的合成、就业的高度稀释
条件是必要的。在下一个拿前步骤中,deprotected 5
在弱酸性条件下承受的benzylic成功
酒精6的关键就是中间访问设计
束缚。在单独的实验中,甲基氯化物和呈
甲烷是反应呈6
e,e,trans-1 trisadduct通过3倍的Bingel C60的反应
没有报道的,文学。有鉴于此,我们
设计了结构性新缆索8(方案2)轴承三
与组织纳入一个好preorganised molecularsystem包括两个macrocycles冠醚型。
此外,来测试bis-additions区域选择消者清性的
对C60,相应的bismalonate缆索7设计
具有相同的结构特点与缆索8。这个
合成缆索7和8中描述的方案2
(用于实验的细节和描述数据看到ESIw)。
2-Bromoethanol保护作为一个TBDMS醚和接受
一个双重的威廉姆森醚化与3,5-dihydroxybenzyl
酒精买不起苯甲醇2。保护
羟基和详细紧随其后的选择性基
家具的硅基醚二4在好的产嫌兄量。将
在一个血红素蛋白中大环的平台与我们尝试cyclisation
二氯甲烷的4呈在高稀释
条件。11在缺乏碱金属阳离子,作为模板,
所需的cyclised产品5不能被探测到的反应
混合物。因此,我们检测了酯化反应
使用李+、钠和钾为模板,在他们的形式
LiBF4,NaBF4,KPF6和KBF4盐。 最高产量的
产品(7%)是KBF4时取得
12是使用,虽然
NaBF4和KPF6形成了5约在5%
孤立的产量。利用LiBF4家具的盐5
只有1%的孤立的产量。值得注意的是,尽管使用了
模板化的合成、就业的高度稀释
条件是必要的。在下一个拿前步骤中,deprotected 5
在弱酸性条件下承受的benzylic成功
酒精6的关键就是中间访问设计
束缚。在单独的实验中,甲基氯化物和呈
甲烷是反应呈6
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以下是谷歌的
翻译
据我们所知,一个稳定的一锅煮合成
E,E,跨1 C60的trisadduct,通过三倍Bingel反应
在文献中尚未见段升报道。考虑到这一点,我们
设计结构新的系绳8(计划2)轴承3
丙二酸组成立两个冠醚型大环组成握辩老的井preorganised molecularsystem。
此外,为了测试双增加的区域选择性
上C60的,相应bismalonate的的系绳7设计
具有的与系绳8相同的结构特点。 “
计划2中所述系绳7日和8的合成
(见ESIw实验细节和特征数据)。
2 - 溴乙醇TBDMS醚作为保护,并受到
到2倍的威廉森醚与3,5 - 二羟基苯
酒精负担苯甲醇2。保护的
其次是选择性脱羟基吡啶组
硅醚二醇4提供良好的收益率。纳入
在一个大环丙二酸成分,我们试图cyclisation
高稀释下丙二酰二氯4二醇
conditions.11在碱金属离子的情况下,作为模板,
所需的5 cyclised产品中没有检测到的反应
的混合物。因此,我们测试的酯化反应
使用的Li +,Na +和K +为模板,在其形式
LiBF4,NaBF4,KPF6 KBF4盐。产量最高的
产品(7%)时,KBF4
12,而
NaBF4和KPF6在5%左右,形成5
孤立的产量。利用的LiBF4盐的布置5
孤立的产量只有1%。值得注意的是,尽管使用
模板合成,高稀释的就业
条件是必要的。在下一步中,有5地deprotected
温和的酸性条件下成功负担苄
6酒精访问的设计是关键中间体
系绳。在单独的实验中,甲基丙二酰氯化物和
丙二酰二氯反应6,在DCM溶剂
使用吡啶作为基地。灶迅 7和8系绳分离
闪光层析柱,其结构分别为
明确指定由1H和13C核磁共振光谱
质谱(见ESIw)
翻译
据我们所知,一个稳定的一锅煮合成
E,E,跨1 C60的trisadduct,通过三倍Bingel反应
在文献中尚未见段升报道。考虑到这一点,我们
设计结构新的系绳8(计划2)轴承3
丙二酸组成立两个冠醚型大环组成握辩老的井preorganised molecularsystem。
此外,为了测试双增加的区域选择性
上C60的,相应bismalonate的的系绳7设计
具有的与系绳8相同的结构特点。 “
计划2中所述系绳7日和8的合成
(见ESIw实验细节和特征数据)。
2 - 溴乙醇TBDMS醚作为保护,并受到
到2倍的威廉森醚与3,5 - 二羟基苯
酒精负担苯甲醇2。保护的
其次是选择性脱羟基吡啶组
硅醚二醇4提供良好的收益率。纳入
在一个大环丙二酸成分,我们试图cyclisation
高稀释下丙二酰二氯4二醇
conditions.11在碱金属离子的情况下,作为模板,
所需的5 cyclised产品中没有检测到的反应
的混合物。因此,我们测试的酯化反应
使用的Li +,Na +和K +为模板,在其形式
LiBF4,NaBF4,KPF6 KBF4盐。产量最高的
产品(7%)时,KBF4
12,而
NaBF4和KPF6在5%左右,形成5
孤立的产量。利用的LiBF4盐的布置5
孤立的产量只有1%。值得注意的是,尽管使用
模板合成,高稀释的就业
条件是必要的。在下一步中,有5地deprotected
温和的酸性条件下成功负担苄
6酒精访问的设计是关键中间体
系绳。在单独的实验中,甲基丙二酰氯化物和
丙二酰二氯反应6,在DCM溶剂
使用吡啶作为基地。灶迅 7和8系绳分离
闪光层析柱,其结构分别为
明确指定由1H和13C核磁共振光谱
质谱(见ESIw)
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