scholarly journals Minimal Hydrolases: Organocatalytic Ring-Opening Polymerizations Catalyzed by Naturally Occurring Carboxylic Acids.

ChemCatChem ◽  
2010 ◽  
Vol 2 (5) ◽  
pp. 487-492 ◽  
Author(s):  
Pablo Domínguez de María
Keyword(s):  
Carboxylic Acids ◽  
Ring Opening ◽  
Naturally Occurring

Iridium-Catalyzed Anti-Stereoselective Asymmetric Ring-Opening Reactions of Azabenzonorbornadienes with Carboxylic Acids

2017 ◽  
Vol 82 (6) ◽  
pp. 3167-3172 ◽  
Author(s):  
Meina Zhu ◽  
Jingchao Chen ◽  
Xiaobo He ◽  
Cuiping Gu ◽  
Jianbin Xu ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Ring Opening ◽  
Ring Opening Reactions ◽  
Asymmetric Ring Opening

Asymmetric total synthesis of paecilomycin C through intramolecular nucleophilic ring opening of an epoxide

2019 ◽  
Vol 17 (31) ◽  
pp. 7369-7379 ◽  
Author(s):  
Joy Chakraborty ◽  
Samik Nanda
Keyword(s):  
Total Synthesis ◽  
Ring Opening ◽  
Asymmetric Total Synthesis ◽  
Naturally Occurring ◽  
Acid Lactone ◽  
Nucleophilic Ring Opening

An efficient asymmetric total synthesis of naturally occurring resorcylic acid lactone (RAL) paecilomycin C was achieved by employing carboxylate assisted 5-exo-tet ring opening of an epoxide as a key reaction.

Asymmetric total synthesis of cryptoconcatone I

2019 ◽  
Vol 17 (14) ◽  
pp. 3552-3566 ◽  
Author(s):  
Ranjan Kumar Acharyya ◽  
Pratik Pal ◽  
Shrestha Chatterjee ◽  
Samik Nanda
Keyword(s):  
Total Synthesis ◽  
Late Stage ◽  
Ring Opening ◽  
Epoxide Ring ◽  
Asymmetric Total Synthesis ◽  
Epoxide Ring Opening ◽  
Cascade Cyclization ◽  
Naturally Occurring

An efficient asymmetric total synthesis of naturally occurring γ-Z-butenolide cryptoconcatone I was achieved by employing substrate-directed reductive epoxide ring opening and late-stage “Pd–Cu” catalyzed cascade cyclization.

Some Transformations of Adducts of 3,6-Dimethoxy-4,5-methylenedioxy-1,2-didehydrobenzene and Furans. An Approach to the 5,8-Dimethoxy-6,7-methylenedioxynaphtho[2,3-c]furan-4,9-dione Ring System of Ventilone A

1998 ◽  
Vol 51 (5) ◽  
pp. 409 ◽  
Author(s):  
Jarrod H. Buttery ◽  
Dieter Wege
Keyword(s):  
Ring Opening ◽  
Ring System ◽  
Subsequent Oxidation ◽  
Naturally Occurring

Adducts derived from the aryne 3,6-dimethoxy-4,5-methylenedioxy-1,2-didehydrobenzene (19) with furan and 2-methoxyfuran have been converted into 5,8-dimethoxy-6,7-methylenedioxy-1,2-naphthoquinone (22) and 5,8-dimethoxy-6,7-methylenedioxy-1,4-naphthoquinone (24) respectively. The trapping of (19) with 1H,3H-furo[3,4-c]furan (38) yielded an unstable adduct (37), which on acid-catalysed ring opening and subsequent oxidation was transformed into 5,8-dimethoxy-6,7-methylenedioxynaphtho[2,3-c]furan-4,9-dione (36), a compound possessing the ring system of the naturally occurring quinone ventilone A.

scholarly journals Synthesis of Two Naturally Occurring 3-Methyl-2,5-dihydro-1-benzoxepin Carboxylic Acids

ChemInform ◽  
2006 ◽  
Vol 37 (6) ◽  
Author(s):  
Seiji Yamaguchi ◽  
Nao Tsuchida ◽  
Masahiro Miyazawa ◽  
Yoshiro Hirai
Keyword(s):  
Carboxylic Acids ◽  
Naturally Occurring

Studies related to naturally occurring acetylene compounds. XXXV. Investigation of Erigeron spp. from the Australian mountains and Tasmania

1969 ◽  
Vol 22 (4) ◽  
pp. 751 ◽  
Author(s):  
JS Sorensen ◽  
NA Sorensen
Keyword(s):  
Carboxylic Acids ◽  
Northern Hemisphere ◽  
Methyl Esters ◽  
Naturally Occurring ◽  
Acetylene Compounds ◽  
Acetylenic Compounds

Two Australian members of the genus Erigeron L. (Compositae, tribe Astereae) have been investigated with particular regard to their content of acetylenic compounds. E. conyzoides F. Muell. contained the methyl esters (I) and (II) of acetylenic carboxylic acids and their corresponding lactones (III) and (IV) and in this resemble the numerous Erigeron spp. of the northern hemisphere investigated earlier. Of the collective species E. pappochroma Labill. three Tasmanian and two Snowy Mountain collections were investigated. None of them contained the acetylenic compounds characteristic of typical Erigeron. Three of these collections contained some simple acetylenic alcohols, (V)-(IX); some of these are characteristic compounds of other genera of the tribus Astereae. In two collections acetylenic compounds were seemingly absent; but dill apiol (XI) was found in appreciable amounts.

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