id sid tid token lemma pos fj236111169 1 1 a a DET fj236111169 1 2 titanocene titanocene ADJ fj236111169 1 3 catalyst catalyst NOUN fj236111169 1 4 system system NOUN fj236111169 1 5 is be AUX fj236111169 1 6 described describe VERB fj236111169 1 7 herein herein ADV fj236111169 1 8 for for ADP fj236111169 1 9 the the DET fj236111169 1 10 synthesis synthesis NOUN fj236111169 1 11 of of ADP fj236111169 1 12 tertiary tertiary ADJ fj236111169 1 13 carbon carbon NOUN fj236111169 1 14 centers center NOUN fj236111169 1 15 . . PUNCT fj236111169 2 1 using use VERB fj236111169 2 2 catalytic catalytic ADJ fj236111169 2 3 titanocene titanocene PROPN fj236111169 2 4 , , PUNCT fj236111169 2 5 phosphine phosphine PROPN fj236111169 2 6 , , PUNCT fj236111169 2 7 and and CCONJ fj236111169 2 8 zinc zinc NOUN fj236111169 2 9 dust dust NOUN fj236111169 2 10 , , PUNCT fj236111169 2 11 zinc zinc NOUN fj236111169 2 12 acetylides acetylide NOUN fj236111169 2 13 can can AUX fj236111169 2 14 be be AUX fj236111169 2 15 generated generate VERB fj236111169 2 16 from from ADP fj236111169 2 17 the the DET fj236111169 2 18 corresponding correspond VERB fj236111169 2 19 iodoalkynes iodoalkyne NOUN fj236111169 2 20 to to PART fj236111169 2 21 affect affect VERB fj236111169 2 22 sequential sequential ADJ fj236111169 2 23 nucleophilic nucleophilic NOUN fj236111169 2 24 additions addition NOUN fj236111169 2 25 to to ADP fj236111169 2 26 aromatic aromatic ADJ fj236111169 2 27 aldehydes aldehyde NOUN fj236111169 2 28 . . PUNCT fj236111169 3 1 the the DET fj236111169 3 2 intermediate intermediate ADJ fj236111169 3 3 propargylic propargylic ADJ fj236111169 3 4 alkoxides alkoxide NOUN fj236111169 3 5 are be AUX fj236111169 3 6 trapped trap VERB fj236111169 3 7 in in ADP fj236111169 3 8 situ situ NOUN fj236111169 3 9 with with ADP fj236111169 3 10 acetic acetic ADJ fj236111169 3 11 anhydride anhydride NOUN fj236111169 3 12 , , PUNCT fj236111169 3 13 which which PRON fj236111169 3 14 are be AUX fj236111169 3 15 susceptible susceptible ADJ fj236111169 3 16 to to ADP fj236111169 3 17 a a DET fj236111169 3 18 second second ADJ fj236111169 3 19 nucleophilic nucleophilic ADJ fj236111169 3 20 displacement displacement NOUN fj236111169 3 21 upon upon SCONJ fj236111169 3 22 treatment treatment NOUN fj236111169 3 23 with with ADP fj236111169 3 24 a a DET fj236111169 3 25 variety variety NOUN fj236111169 3 26 of of ADP fj236111169 3 27 electron electron NOUN fj236111169 3 28 rich rich ADJ fj236111169 3 29 species specie NOUN fj236111169 3 30 , , PUNCT fj236111169 3 31 including include VERB fj236111169 3 32 acetylides acetylide NOUN fj236111169 3 33 and and CCONJ fj236111169 3 34 electron electron NOUN fj236111169 3 35 - - PUNCT fj236111169 3 36 rich rich ADJ fj236111169 3 37 aromatics aromatic NOUN fj236111169 3 38 . . PUNCT fj236111169 4 1 the the DET fj236111169 4 2 use use NOUN fj236111169 4 3 of of ADP fj236111169 4 4 two two NUM fj236111169 4 5 acetylide acetylide NOUN fj236111169 4 6 units unit NOUN fj236111169 4 7 as as SCONJ fj236111169 4 8 the the DET fj236111169 4 9 nucleophilic nucleophilic NOUN fj236111169 4 10 components component NOUN fj236111169 4 11 provides provide VERB fj236111169 4 12 symmetrical symmetrical ADJ fj236111169 4 13 and and CCONJ fj236111169 4 14 unsymmetrical unsymmetrical ADJ fj236111169 4 15 1,4 1,4 NOUN fj236111169 4 16 - - PUNCT fj236111169 4 17 diynes diyne NOUN fj236111169 4 18 . . PUNCT fj236111169 5 1 this this DET fj236111169 5 2 adaptable adaptable ADJ fj236111169 5 3 methodology methodology NOUN fj236111169 5 4 also also ADV fj236111169 5 5 includes include VERB fj236111169 5 6 electron electron NOUN fj236111169 5 7 - - PUNCT fj236111169 5 8 rich rich ADJ fj236111169 5 9 arenes arene NOUN fj236111169 5 10 as as ADP fj236111169 5 11 the the DET fj236111169 5 12 third third ADJ fj236111169 5 13 nucleophilic nucleophilic NOUN fj236111169 5 14 component component NOUN fj236111169 5 15 , , PUNCT fj236111169 5 16 to to PART fj236111169 5 17 provide provide VERB fj236111169 5 18 substituted substitute VERB fj236111169 5 19 butenolides butenolide NOUN fj236111169 5 20 and and CCONJ fj236111169 5 21 diarylethynyl diarylethynyl ADJ fj236111169 5 22 methanes methane NOUN fj236111169 5 23 in in ADP fj236111169 5 24 good good ADJ fj236111169 5 25 yields yield NOUN fj236111169 5 26 . . PUNCT fj236111169 6 1 additional additional ADJ fj236111169 6 2 investigation investigation NOUN fj236111169 6 3 into into ADP fj236111169 6 4 the the DET fj236111169 6 5 catalytic catalytic ADJ fj236111169 6 6 metalation metalation NOUN fj236111169 6 7 capability capability NOUN fj236111169 6 8 of of ADP fj236111169 6 9 titanocene titanocene PROPN fj236111169 6 10 provides provide VERB fj236111169 6 11 novel novel ADJ fj236111169 6 12 entries entry NOUN fj236111169 6 13 to to PART fj236111169 6 14 chalcones chalcone NOUN fj236111169 6 15 from from ADP fj236111169 6 16 & & CCONJ fj236111169 6 17 # # SYM fj236111169 6 18 945;-halo 945;-halo NUM fj236111169 6 19 ketones ketone NOUN fj236111169 6 20 and and CCONJ fj236111169 6 21 aldehydes aldehyde NOUN fj236111169 6 22 , , PUNCT fj236111169 6 23 and and CCONJ fj236111169 6 24 homopropargyl homopropargyl PROPN fj236111169 6 25 alcohols alcohol NOUN fj236111169 6 26 from from ADP fj236111169 6 27 propargylic propargylic ADJ fj236111169 6 28 acetates acetate NOUN fj236111169 6 29 and and CCONJ fj236111169 6 30 aldehydes aldehyde NOUN fj236111169 6 31 . . PUNCT fj236111169 7 1 finally finally ADV fj236111169 7 2 , , PUNCT fj236111169 7 3 an an DET fj236111169 7 4 alternative alternative ADJ fj236111169 7 5 approach approach NOUN fj236111169 7 6 to to ADP fj236111169 7 7 diarylethynyl diarylethynyl ADJ fj236111169 7 8 methanes methane NOUN fj236111169 7 9 from from ADP fj236111169 7 10 terminal terminal PROPN fj236111169 7 11 alkynes alkyne NOUN fj236111169 7 12 and and CCONJ fj236111169 7 13 brønsted brønsted ADJ fj236111169 7 14 acid acid NOUN fj236111169 7 15 is be AUX fj236111169 7 16 described describe VERB fj236111169 7 17 using use VERB fj236111169 7 18 indium indium NOUN fj236111169 7 19 catalysis catalysis NOUN fj236111169 7 20 . . PUNCT