[A case of anaplastic pancreatic cancer with osteoclast-like giant cells during follow-up of a branch-duct pancreatic intraductal papillary mucinous tumor].

In this study, a 76-year-old man initially diagnosed with branch-duct pancreatic intraductal papillary mucinous tumor is presented. During follow-up, stenosis was discovered in the main pancreatic duct of the tail. A nodular lesion was found in the pancreatic duct consistent with the stenosis.

meso-β dibenzo[a,g]corannulene-fused porphyrins.

FeCl3-mediated oxidative fusion of meso-linked dibenzo[a,g]corannulene-porphyrin dyads 6M afforded fused porphyrins 7M bearing a five-membered ring connection, but similar oxidation of β-linked dyads 9M provided fused porphyrins 10M bearing a six-membered ring connection, both in a regiospecific manner. While fused dyads 10M exhibit modestly red-shifted absorption and fluorescence profiles, fused dyads 7M display characteristically red-shifted absorption bands reflecting antiaromatic dehydropurpurin electronic networks.

Palladium-catalyzed asymmetric synthesis of silicon-stereogenic dibenzosiloles via enantioselective C-H bond functionalization.

A Pd-catalyzed asymmetric synthesis of Si-stereogenic dibenzosiloles is developed through enantioselective C-H bond functionalization of prochiral 2-(arylsilyl)aryl triflates. High chemo- and enantioselectivities are achieved by employing a Josiphos-type ligand under mild conditions.

The direct catalytic asymmetric aldol reaction of α-substituted nitroacetates with aqueous formaldehyde under base-free neutral phase-transfer conditions.

Enantioselective direct aldol reaction of α-substituted nitroacetates with aqueous formaldehyde for the synthesis of α-alkyl serines has been achieved under base-free neutral phase-transfer conditions with a bifunctional chiral phase-transfer catalyst.