PATENT CLAIM ANALYSIS

Application Number: 16146275
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-03
Patent Classification: ["556", "053000"]

Abstract:
The present invention relates to a new process for the synthesis of 2,3,4,5,6,7-substituted indenes, which are useful precursors for the formation of certain ansa-metallocene catalysts.

Claim (Index 1):
A process for the preparation of a compound of the formula I shown below: wherein:\n R 1  and R 2  are each (1-10C)alkyl; \n and wherein the process comprises the steps of:\n (i) reacting a compound of formula A: \n \u2003wherein R 1  and R 2  are each as defined above; \u2003with a chlorinating or brominating agent to form a compound of formula B: \u2003wherein R 1  and R 2  are each as defined above and X is chloro or bromo; \u2003and adding 1,2,3,4-tetramethylbenzene and a Lewis acid catalyst to the reaction mixture to react with compound B to form a compound of formula C: \u2003wherein R 1  and R 2  are each as defined above; (ii) reacting the compound of formula C with a solution of a hydride transfer reagent followed by adding a dehydrating agent to the reaction mixture to form a compound of Formula I.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 97.0
- Lexical Diversity: 1.125
- Patent Class: 556.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15542756', '14781844', '13393767', '12593879', '15748557']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7585641280848255
- 35 USC 102 Novelty (BERT): 0.5017192938086869
- Combined Prediction Score: 0.7328796446572117
- Mean Citation Score: 248.932456
- Max Citation Score: 255.69185
- Similarity Product: 176.22411438362002

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test