2004
DOI: 10.1021/ol048624n
|View full text |Cite
|
Sign up to set email alerts
|

Nucleophilic Addition to 3-Substituted Pyridinium Salts:  Expedient Syntheses of (−)-L-733,061 and (−)-CP-99,994

Abstract: [reaction: see text] The addition of nucleophiles to 3-substituted pyridinium salts prepared from N-methylbenzamide and various pyridines has been investigated. Good to excellent regioselectivities favoring the 2,3-disubstituted 1,2-dihydropyridines were observed. The resulting 1,2-dihydropyridines led to the corresponding 2,3-disubstituted pyridines upon treatment with Mn(OAc)3/NaIO4. This methodology was also successfully applied to the enantioselective syntheses of (-)-L-733,061 and (-)-CP-99,994, two membe… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

1
28
1
1

Year Published

2007
2007
2016
2016

Publication Types

Select...
7
2

Relationship

0
9

Authors

Journals

citations
Cited by 90 publications
(31 citation statements)
references
References 22 publications
1
28
1
1
Order By: Relevance
“…Furthermore, stereoselective variants have been reported. Comins, 9 Wanner, 10 and Charette 11 have pioneered the use of chiral auxiliaries to control the facial selectivity of Grignard additions to pyridinium salts, though a blocking group at the C3 position is often required for high regio- and diastereoselectivity.…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, stereoselective variants have been reported. Comins, 9 Wanner, 10 and Charette 11 have pioneered the use of chiral auxiliaries to control the facial selectivity of Grignard additions to pyridinium salts, though a blocking group at the C3 position is often required for high regio- and diastereoselectivity.…”
Section: Introductionmentioning
confidence: 99%
“…In our opinion the following examples represent the most efficient synthesis of 3-piperidinols of type B in terms of step-economy (<10 steps to establish the core motif B ): 1. Charette [36] prepared the less bioactive enantiomers of L-733,060 and CP-99,994 through nucleophilic additions to chiral pyridylium salts and subsequent hydrogenation. 2.…”
Section: Introductionmentioning
confidence: 99%
“…[73] Both the strong directing effect of the imidate nitrogen atom and stereoelectronic effects led to the formation of 2,3-disubstituted dihydropyridines in good yields and regioselectivities (Table 16). [73] Both the strong directing effect of the imidate nitrogen atom and stereoelectronic effects led to the formation of 2,3-disubstituted dihydropyridines in good yields and regioselectivities (Table 16).…”
Section: Pauson-khand Reactionsmentioning
confidence: 99%