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Riebel, B.1
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0002923489
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16
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0001737777
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(a) Tsuboi, S.; Nishiyama, E.; Furutani, H.; Utaka, M.; Takeda, A. J. Org. Chem. 1987, 52, 1359.
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0032808807
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α-substituted β-keto aldehyde
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(d) Hayakawa, R.; Shimizu, M. Synlett 1999, 1298; (α-substituted β-keto aldehyde).
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Hayakawa, R.1
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20
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0018571612
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Lactone 6 is known in racemic form: (a) Adams, M. A.; Duggan, A. J.; Smolanoff, J.; Meinwald, J. J. Am. Chem. Soc. 1979, 101, 5364.
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21
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0001212549
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(b) Willson, T. M.; Kocienski, P.; Jarowicki, K.; Isaac, K.; Faller, A.; Campbell, S. F.; Bordner, J. Tetrahedron 1990, 46, 1757.
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22
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0022400671
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(c) Lactone syn-(5R,6R)-6 has been used in the synthesis of (+)-pederin: Nakata, T.; Nagao, S.; Oishi, R. Tetrahedron Lett. 1985, 26, 6465.
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85007676908
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(a) Akita, H.; Furuichi, A.; Koshiji, H.; Horikoshi, K.; Oishi, T. Chem. Pharm. Bull. 1983, 31, 4376.
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0001016728
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27
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0342550934
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In a hexane-buffer biphasic system the reduction of compound 2 with recLBADH proceeded to only 20% conversion after five days (NADPH-recycling with 2-propanol)
-
In a hexane-buffer biphasic system the reduction of compound 2 with recLBADH proceeded to only 20% conversion after five days (NADPH-recycling with 2-propanol).
-
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28
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0034619265
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0001585193
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0007141455
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Collett, L.A.1
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36
-
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0023777727
-
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Procedure similar to: Gilbreath, S. G.; Harris, C. M.; Harris, T. M. J. Am. Chem. Soc. 1988, 110, 6172.
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-
37
-
-
85086351641
-
-
note
-
-1 and the washed silica gel was dried at 105 °C for 24 h.
-
-
-
-
38
-
-
85086351881
-
-
note
-
-1) were added trifluoroacetic acid anhydride (7 μL) and pyridine (5 μL). The vial was capped and incubated at 40 °C for 10 min.
-
-
-
-
39
-
-
0001019699
-
-
Preparation of bisenolates according to: (a) Weiler, L. J. Am. Chem. Soc. 1970, 92, 6702.
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-
-
Weiler, L.1
-
40
-
-
0000646470
-
-
Weinreb amides were therefore applied as acylating reagents
-
(b) We found that an ester-based acylation procedure described by the same author resulted in low yields: Huckin, S. N.; Weiler, L. Can. J. Chem. 1974, 52, 1343; Weinreb amides were therefore applied as acylating reagents.
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(1974)
Can. J. Chem.
, vol.52
, pp. 1343
-
-
Huckin, S.N.1
Weiler, L.2
-
42
-
-
85086352808
-
-
note
-
6, one of the two enol forms is suppressed to approx. 5%.
-
-
-
-
43
-
-
85086351545
-
-
note
-
c-5(anti)(average value; maximum deviation ±8%). Signals of the enol forms were ignored since it can be assumed that both diastereomers undergo enolization to a similar extent.
-
-
-
-
44
-
-
0343856557
-
-
Data taken from the diastereomeric mixture, reference 28
-
Data taken from the diastereomeric mixture, reference 28.
-
-
-
-
45
-
-
85083270067
-
-
Procedure similar to: (a) Ohta, S.; Shimabayashi, A.; Hayakawa, S.; Sumino, M.; Okamoto, M. Synthesis 1985, 45.
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(1985)
Synthesis
, pp. 45
-
-
Ohta, S.1
Shimabayashi, A.2
Hayakawa, S.3
Sumino, M.4
Okamoto, M.5
-
46
-
-
84986349377
-
-
(b) Deschenaux, P.-F.; Kallimopoulos, T.; Stœckli-Evans, H.; Jacot-Guillarmod, A. Helv. Chim. Acta 1989, 72, 731.
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Deschenaux, P.-F.1
Kallimopoulos, T.2
Stœckli-Evans, H.3
Jacot-Guillarmod, A.4
-
47
-
-
0000548610
-
-
Prepared from compound rac-9 as described in the general procedure I, Compound rac-9, in turn, was prepared from tert-butyl acetoacetate and propionaldehyde according to: Huckin, S. N.; Weiler, L. Can. J. Chem. 1974, 52, 2157.
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(1974)
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, vol.52
, pp. 2157
-
-
Huckin, S.N.1
Weiler, L.2
-
48
-
-
85086351872
-
-
note
-
12c as described for the (4A,5S)-stereoisomer.
-
-
-
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