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the chirality sensing is based on spontaneous asymmetric transformation of the first kind with stereolabile binaphtholate boron and zinc complexes.

the steadily increasing efficiency in asymmetric synthesis has shifted focus toward the development of time efficient optical techniques with potential for high-throughput screening.

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2Â¥: Originally posted by RXMCDM at 2014-02-15 17:16:56
ÊÖÐÔ¼ì²â»ùÓÚÁ¢Ìå²»Îȶ¨µÄ  Áª¶þÝÁ·ÓÅðпÅäºÏÎïµÄµÚÒ»Àà×Ô·¢ÐÔ²»¶Ô³Æ×ª±ä¡£

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time efficient optical techniques ¼«¾ßʱ¼äЧÂ浀 ...

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hsiaoeng.221

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ÒýÓûØÌû:
2Â¥: Originally posted by RXMCDM at 2014-02-15 17:16:56
ÊÖÐÔ¼ì²â»ùÓÚÁ¢Ìå²»Îȶ¨µÄ  Áª¶þÝÁ·ÓÅðпÅäºÏÎïµÄµÚÒ»Àà×Ô·¢ÐÔ²»¶Ô³Æ×ª±ä¡£

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time efficient optical techniques ¼«¾ßʱ¼äЧÂ浀 ...

chirality sensing of amines,diamines,amino acids,amino alcohols,and ¦Á-hydroxy acids with a single probe Õâ¾äÈçºÎµ÷Õû·­ÒëÄØ

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Óà a single probe ¶Ôamines,diamines,amino acids,amino alcohols,and ¦Á-hydroxy acids µÄÊÖÐÔ½øÐмì²â¡£»òÓà a single probe ¼ì²âamines,diamines,amino acids,amino alcohols,and ¦Á-hydroxy acids µÄÊÖÐÔ¡£
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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-02-23 15:51:15
RXMCDM: ¶àлӦÖú£¡ 2014-02-25 20:39:41
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6Â¥2014-02-23 15:26:35
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hsiaoeng.221

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ÒýÓûØÌû:
6Â¥: Originally posted by ÓÀÔ¶µÄNO.1 at 2014-02-23 15:26:35
the chirality sensing is based on spontaneous asymmetric transformation of the first kind with stereolabile binaphtholate boron and zinc complexes.
ÊÖÐÔ´«¸ÐÊÇ»ùÓÚ×Ô·¢µÄ²»¶Ô³Æ×ª»»µÄµÚÒ»ÖÖstereolabile ...

Çó·­ÒëThis  approach  eliminates  the  use  of
enantiopure BINOL and solely relies on chiral amplification
based on central-to-axial chirality induction with stereolabile
binaphthol 2 serving as the CD reporter unit. Compared to the
general chirality sensing method with B(OMe)3 and 2 described
above, the three-component assembly with  31  is limited to
substrates having a primary amino group. But it is not applicable
to N-methyl ephedrine, 20, and other amines or amino alcohols
with secondary or tertiary amino functions.
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7Â¥2014-04-13 15:52:15
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hsiaoeng.221

гæ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by RXMCDM at 2014-02-15 17:16:56
ÊÖÐÔ¼ì²â»ùÓÚÁ¢Ìå²»Îȶ¨µÄ  Áª¶þÝÁ·ÓÅðпÅäºÏÎïµÄµÚÒ»Àà×Ô·¢ÐÔ²»¶Ô³Æ×ª±ä¡£

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time efficient optical techniques ¼«¾ßʱ¼äЧÂ浀 ...

Çó·­ÒëRecently, Anslyn, James, and Bull introduced an attractive
assay for the detection and ee analysis of primary amines that is
based on a three-component assembly with enantiopure atropos

BINOL and 2-formylphenylboronic acid.23 We assumed that the
covalent binding of monoamines via condensation with a 2-
formyl-4-methoxyphenylborate complex carrying binaphtholate
2 would yield a strong CD output originating from asymmetric
amplification in our probe. Indeed, weak CD signals below 300
nm were obtained from the condensation product of 2-formyl-4-
methoxyphenylboronic acid  31  and amines  11,  32, and  33,
respectively. This largely changed when the same reaction was
performed in the presence of 1 equiv of 2, and we observed
significantly enhanced Cotton effects at higher wavelengths
(Figure 3        and  SI).  This  approach  eliminates  the  use  of
enantiopure BINOL and solely relies on chiral amplification
based on central-to-axial chirality induction with stereolabile
binaphthol 2 serving as the CD reporter unit. Compared to the
general chirality sensing method with B(OMe)3 and 2 described
above, the three-component assembly with  31  is limited to
substrates having a primary amino group. But it is not applicable
to N-methyl ephedrine, 20, and other amines or amino alcohols
with secondary or tertiary amino functions.
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8Â¥2014-04-13 15:54:19
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